Justin Theroux still 'heartbroken' over Jennifer Aniston split despite dating rumors (exclusive)

Despite what fans may have heard, Justin Theroux is still getting over his breakup from Jennifer Aniston, a source tells ET. 

Rumors have been swirling this week that the 46-year-old actor-writer is dating Petra Collins after his Instagram followers took notice of a photo he posted of himself with the 25-year-old artist back in February. Theroux shared the pic on the same day he was photographed at the Adam Selman show during New York Fashion Week.

"Justin is still heartbroken," a source tells ET, adding that Theroux is not one to play the field but rather prefers to be in a relationship and is still reeling over the fact that his marriage to Aniston did not work out. 

@adamselman 🐾💦🤫 takeover by @petrafcollins 🦄

A post shared by @ justintheroux on

Meanwhile, another source tells ET that the former Leftovers star has been relying on his friends to help him cope with the breakup, and notes that Theroux "had a nice time" during his "guys' trip" to Paris, France, earlier this month.

When abroad, the newly single star attended the Louis Vuitton runway show during Paris Fashion Week, and while his pals might have been eager to hit the town and flirt with women, Theroux was friendly rather than flirty, according to the source.

24 PHOTOS
Justin Theroux out and about
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Justin Theroux out and about
PARIS, FRANCE - MARCH 05: Actor Justin Theroux is seen on March 5, 2018 in Paris, France. (Photo by Marc Piasecki/GC Images)
PARIS, FRANCE - MARCH 05: Actor Justin Theroux is seen on March 5, 2018 in Paris, France. (Photo by Marc Piasecki/GC Images)
NEW YORK, NY - FEBRUARY 12: Actor Justin Theroux is seen walking in Soho on February 12, 2018 in New York City. (Photo by Raymond Hall/GC Images)
NEW YORK, NY - FEBRUARY 08: Actor Justin Theroux attends the Adam Selman front row during New York Fashion Week: The Shows at Gallery I at Spring Studios on February 8, 2018 in New York City. (Photo by John Lamparski/Getty Images for New York Fashion Week: The Shows)
NEW YORK, NY - NOVEMBER 30: Justin Theroux attends an evening honoring Louis Vuitton and Nicolas Ghesquiere at Alice Tully Hall at Lincoln Center on November 30, 2017 in New York City. (Photo by Noam Galai/WireImage)
NEW YORK, NY - OCTOBER 25: Actor Justin Theroux is seen on October 25, 2017 in New York City. (Photo by UMV/Star Max/GC Images)
NEW YORK, NY - SEPTEMBER 19: Justin Theroux is seen on the set of 'Good Morning America' on September 19, 2017 in New York City. (Photo by Raymond Hall/GC Images)
NEW YORK, NY - SEPTEMBER 19: Actor Justin Theroux leaves the 'Good Morning America' taping at the ABC Times Square Studios on September 19, 2017 in New York City. (Photo by Ray Tamarra/GC Images)
WESTWOOD, CA - SEPTEMBER 16: Actor Justin Theroux attends the premiere of 'The LEGO Ninjago Movie' at Regency Village Theatre on September 16, 2017 in Westwood, California. (Photo by Jason LaVeris/FilmMagic)
WESTWOOD, CA - SEPTEMBER 16: Actor Justin Theroux attends the premiere of 'The LEGO Ninjago Movie' at Regency Village Theatre on September 16, 2017 in Westwood, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - SEPTEMBER 12: Justin Theroux is seen at LAX on September 12, 2017 in Los Angeles, California. (Photo by starzfly/Bauer-Griffin/GC Images)
LOS ANGELES, CA - JULY 27: Actors Jason Bateman (L) and Justin Theroux attend the 5th Annual Ping Pong 4 Purpose on July 27, 2017 in Los Angeles, California. (Photo by Allen Berezovsky/WireImage)
HOLLYWOOD, CA - JULY 26: Jennifer Aniston and Justin Theroux attend the ceremony honoring Jason Bateman with Star On The Hollywood Walk Of Fame on July 25, 2017 in Hollywood, California. (Photo by JB Lacroix/WireImage)
SAN DIEGO, CA - JULY 20: Actors Dave Franco (L) and Justin Theroux of 'Lego Ninjago' at 2017 WIRED Cafe at Comic Con, presented by AT&T Audience Network on July 20, 2017 in San Diego, California. (Photo by Phillip Faraone/Getty Images for WIRED)
SAN DIEGO, CA - JULY 21: (L-R) Actors Dave Franco, Kumail Nanjiani, Abbi Jacobson, Justin Theroux, Michael Pena, Olivia Munn and Zach Woods attend MT Fandom Fest at PETCO Park on July 21, 2017 in San Diego, California. (Photo by Kevin Winter/Getty Images for MTV)
NEW YORK, NY - JULY 18: Jennifer Aniston and Justin Theroux seen leaving a restaurant in West Village on July 18, 2017 in New York City. (Photo by Robert Kamau/GC Images)
NEW YORK - JULY 18: Justin Theroux in a sleeveless print tee is seen grocery shopping in West Village on July 18, 2017 in New York, New York. (Photo by Josiah Kamau/BuzzFoto via Getty Images)
NEW YORK, NY - JULY 18: Actor Justin Theroux is seen biking in Soho on July 18, 2017 in New York City. (Photo by Raymond Hall/GC Images)
LOS ANGELES, CA - JUNE 19: Actor Justin Theroux attends SAG-AFTRA Foundation's Conversations with 'The Leftovers' at SAG-AFTRA Foundation Screening Room on June 19, 2017 in Los Angeles, California. (Photo by Vincent Sandoval/Getty Images)
LOS ANGELES, CA - JUNE 19: Actor Justin Theroux attends SAG-AFTRA Foundation's Conversations with 'The Leftovers' at SAG-AFTRA Foundation Screening Room on June 19, 2017 in Los Angeles, California. (Photo by Vincent Sandoval/Getty Images)
LOS ANGELES, CA - JUNE 04: Justin Theroux, Kevin Garvey on stage at HBO's 'The Leftovers' - FYC on June 4, 2017 in Los Angeles, California. (Photo by FilmMagic/FilmMagic for HBO)
LOS ANGELES, CA - JUNE 04: Actors Carrie Coon, Nora Durst and Justin Theroux, Kevin Garvey attend HBO's 'The Leftovers' - FYC on June 4, 2017 in Los Angeles, California. (Photo by FilmMagic/FilmMagic for HBO)
NEW YORK, NEW YORK - JUNE 01: (L-R) Carrie Coon, Justin Theroux and Amy Brenneman attend the 'The Leftovers' FYC New York Screening at Metrograph on June 01, 2017 in New York City. (Photo by Mike Coppola/Getty Images)
NEW YORK, NY - MAY 30: Justin Theroux at Good Morning America on May 30, 2017 in New York City. (Photo by Gotham/GC Images)
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A third source tells ET that Theroux is, however, ready for "his next phase in life." 

As for his relationship with Collins, the third source says the two met through Selena Gomez when "they all hung out together."

"She is artsy and edgy and loves the New York nightlife," the source says of Collins before calling out that Gomez -- who's also friendly with Aniston -- recently unfollowed the artist on Instagram.

Despite his apparent heartbreak, the source says Theroux is confident that his breakup with the 49-year-old actress was the right decision as their relationship had been "going south for a long time."

“He felt confined by their relationship. He wasn't interested with Jen's everyday scheduled life of yoga classes, eating healthy,” the source continues. “Justin is a free spirit and loves his time alone. Justin had a need for independence.”

43 PHOTOS
Jennifer Aniston through the years
See Gallery
Jennifer Aniston through the years
FERRIS BUELLER -- Pictured: Jennifer Aniston as Jeannie Bueller -- Photo by: Alice S. Hall/NBC/NBCU Photo Bank
1990 file photo of Jennifer Aniston at a NBC pool party in Los Angeles, California (Photo by Barry King/WireImage)
FRIENDS -- Pictured: Jennifer Aniston as Rachel Green -- (Photo by Reisig & Taylor/NBC/NBCU Photo Bank via Getty Images)
FRIENDS -- Season 1 -- Pictured: (back l-r) Matt LeBlanc as Joey Tribbiani, Lisa Kudrow as Phoebe Buffay, David Schwimmer as Ross Geller, Matthew Perry as Chandler Bing (front l-r) Courteney Cox as Monica Geller, Jennifer Aniston as Rachel Green -- (Photo by Reisig & Taylor/NBC/NBCU Photo Bank via Getty Images)
FRIENDS -- Pictured: (l-r) Courteney Cox as Monica Geller, Jennifer Aniston as Rachel Green, Lisa Kudrow as Phoebe Buffay in 'Friends', circa 1995. (Photo by NBC/NBCU Photo Bank via Getty Images)
255721 02: Jennifer Aniston poses January 4, 1996 in Aspen, CO. Along with her role as Rachel on the television show 'Friends,' actress Aniston starred in the films 'Picture Perfect' and 'She's The One.' (Photo by Russell Turiak/Liaison)
1997 Jennifer Aniston Stars In The Movie 'Til There Was You'. (Photo By Getty Images)
FRIENDS -- Season 4 -- Pictured: (l-r) Matt LeBlanc as Joey Tribbiani, Jennifer Aniston as Rachel Green, Lisa Kudrow as Phoebe Buffay (Photo by Gerald Weinman/NBC/NBCU Photo Bank via Getty Images)
UNITED STATES - NOVEMBER 03: Jennifer Aniston arrives for premiere of movie 'Meet Joe Black' at the Ziegfeld Theater. (Photo by Richard Corkery/NY Daily News Archive via Getty Images)
372882 01: Jennifer Aniston stars in 'Friends,' 1999-2000 season. Photo by: Warner Bros. NBC
Co-hosts Courteney Cox Arquette, Lisa Kudrow and Jennifer Aniston at 'The 10th Annual Fire & Ice Ball', a gala event, hosted by Lilly Tartikoff and Ronald O. Perelman, to raise funds for Revlon/UCLA women's cancer research program. 12/11/00 at the Beverly Hilton Hotel in Los Angeles, Ca. (Photo by Kevin Winter/Getty Images)
PASADENA, : Actress Jennifer Aniston of the television show 'Friends' accepts her People's Choice Award for 'Favorite Female Television Performer' during the 27th Annual People's Choice Awards 07 January 2001 in Pasadena CA. AFP Photo Lucy NICHOLSON/ (Photo credit should read LUCY NICHOLSON/AFP/Getty Images)
Jennifer Aniston on 'The Tonight Show with Jay Leno' at the NBC Studios in Burbank, Ca. 9/5/01. Los Angeles. Photo by Kevin Winter/Getty Images.
Jennifer Aniston during The 54th Annual Primetime Emmy Awards - Press Room at The Shrine Auditorium in Los Angeles, California, United States. (Photo by Gregg DeGuire/WireImage)
Jennifer Aniston (Photo by J. Merritt/FilmMagic)
Jennifer Aniston and Brad Pitt during 'Along Came Polly' Los Angeles Premiere at Mann's Chinese Theater in Hollywood, California, United States. (Photo by Jon Kopaloff/FilmMagic)
Jennifer Aniston during 9th Annual Hollywood Film Festival Awards Gala Ceremony - Show at Beverly Hilton in Los Angeles, California, United States. (Photo by J.Sciulli/WireImage)
Jennifer Aniston, presenter (Photo by Jeff Kravitz/FilmMagic)
LOS ANGELES, CA - DECEMBER 09: Actress Jennifer Aniston arrives at the premiere screening of the FX Network's 'Dirt' at the Paramount Theater on December 9, 2006 in Los Angeles, California. (Photo by Charley Gallay/Getty Images)
NEW YORK - DECEMBER 17: Jennifer Aniston visits the ''Late Show with David Letterman'' at the Ed Sullivan Theater on December 17, 2008 in New York City. (Photo by James Devaney/WireImage)
MARRAKECH, MOROCCO - NOVEMBER 26: Actress Jennifer Aniston attends the Gala evening to celebrate the re-opening of Hotel La Mamounia on November 26, 2009 in Marrakech, Morocco. (Photo by Fizcairn/WireImage)
NEW YORK - MARCH 16: Jennifer Aniston attends the premiere of 'The Bounty Hunter' at Ziegfeld Theatre on March 16, 2010 in New York, New York City. (Photo by James Devaney/WireImage)
LATE NIGHT WITH JIMMY FALLON -- Episode 876 -- Pictured: (l-r) Jennifer Aniston with host Jimmy Fallon during an interview on August 1, 2013 -- (Photo by: Lloyd Bishop/NBC/NBCU Photo Bank via Getty Images)
MADRID, SPAIN - FEBRUARY 22: Actress Jennifer Aniston attends 'El Hormiguero' Tv showon February 22, 2011 in Madrid, Spain. (Photo by Juan Naharro Gimenez/Getty Images)
Actress Jennifer Aniston arrives at the 'Horrible Bosses' Los Angeles premiere at Grauman's Chinese Theatre on June 30, 2011 in Hollywood, California.
LOS ANGELES, CA - OCTOBER 17: Jennifer Aniston arrives as ELLE Honors Hollywood+s Most Esteemed Women in the 18th Annual Women in Hollywood Tribute; at The Four Seasons Beverly Hills on October 17, 2011 in Los Angeles, California. (Photo by Gregg DeGuire/FilmMagic)
BEVERLY HILLS, CA - NOVEMBER 15: Justin Theroux and Jennifer Aniston attend the American Cinematheque 26th annual award presentation at The Beverly Hilton Hotel on November 15, 2012 in Beverly Hills, California. (Photo by Jason LaVeris/FilmMagic)
TORONTO, ON - SEPTEMBER 14: Actress/producer Jennifer Aniston arrives at the 'Life Of Crime' Premiere during the 2013 Toronto International Film Festival at Roy Thomson Hall on September 14, 2013 in Toronto, Canada. (Photo by Isaiah Trickey/FilmMagic)
HOLLYWOOD, CA - NOVEMBER 21: Actress Jennifer Aniston speaks onstage during a Q&A following the screening of 'Cake' during the 2014 Variety Screening Series at ArcLight Hollywood on November 21, 2014 in Hollywood, California. (Photo by Imeh Akpanudosen/Getty Images)
LOS ANGELES, CA - AUGUST 19: Jennifer Aniston arrives at the Premiere Of Lionsgate Premiere's 'She's Funny That Way' at Harmony Gold on August 19, 2015 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
SANTA MONICA, CA - JANUARY 17: Actress Jennifer Aniston arrives at the 21st Annual Critics' Choice Awards at Barker Hangar on January 17, 2016 in Santa Monica, California. (Photo by C Flanigan/Getty Images)
HOLLYWOOD, CA - APRIL 13: Actress Jennifer Aniston attends Open Roads World Premiere of 'Mother's Day' at TCL Chinese Theatre IMAX on April 13, 2016 in Hollywood, California. (Photo by Frederick M. Brown/Getty Images)
NEW YORK, NY - JUNE 16: Actress Jennifer Aniston is seen walking in Soho on June 16, 2016 in New York City. (Photo by Raymond Hall/GC Images)
NEW YORK, NY - JUNE 24: Jennifer Aniston seen on the streets of Manhattan on June 24, 2016 in New York City. (Photo by James Devaney/GC Images)
NEW YORK, NY - SEPTEMBER 30: Jennifer Aniston is seen in the West Village on September 30, 2016 in New York City. (Photo by Alo Ceballos/GC Images)
WESTWOOD, CA - DECEMBER 07: Actress Jennifer Aniston arrives at the Los Angeles Premiere 'Office Christmas Party' at Regency Village Theatre on December 7, 2016 in Westwood, California. (Photo by Jon Kopaloff/FilmMagic)
LOS ANGELES, CA - DECEMBER 08: Jennifer Aniston is seen at 'Jimmy Kimmel Live' on December 08, 2016 in Los Angeles, California. (Photo by RB/Bauer-Griffin/GC Images)
US actress Jennifer Aniston addresses the audience at the 89th Oscars on February 26, 2017 in Hollywood, California. / AFP / Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)
LOS ANGELES, CA - APRIL 04: Jennifer Aniston attends the premiere of HBO's 'The Leftovers' Season 3 at Avalon Hollywood on April 4, 2017 in Los Angeles, California. (Photo by JB Lacroix/WireImage)
US actress Jennifer Aniston gestures as she poses during a photocall ahead of a diner for the launch of a Louis Vuitton leather goods collection in collaboration with US artist Jeff Koons, at the Louvre in Paris on April 11, 2017. / AFP PHOTO / GABRIEL BOUYS (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)
PARIS, FRANCE - APRIL 14: Actress Jennifer Aniston is seen leaving the 'Dries Van Noten' store on April 14, 2017 in Paris, France. (Photo by Marc Piasecki/GC Images)
Actor Jennifer Aniston (L) and Justin Theroux attend Jason Bateman's star unveiling ceremony on the Hollywood Walk of Fame, on July 26, 2017, in Hollywood, California. / AFP PHOTO / VALERIE MACON (Photo credit should read VALERIE MACON/AFP/Getty Images)
BEVERLY HILLS, CA - JANUARY 07: In this handout photo provided by NBCUniversal, Presenters Carol Burnett and Jennifer Aniston onstage during the 75th Annual Golden Globe Awards at The Beverly Hilton Hotel on January 7, 2018 in Beverly Hills, California. (Photo by Paul Drinkwater/NBCUniversal via Getty Images)
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