"There was a reason why I split up with him. And there was a reason why I'm at this point in my life where I feel like I have so much musical freedom, and I don't have to explain myself to anybody," she says. "It was more of a thing where I was in awe. I was at that point in my relationship where I felt he could do no wrong. I thought he had my back and that he'd never steer me wrong."
The 24-year-old singer said after she finished working with Harris on "I Will Never Let You Down," he sort of let her down. "Everything started to go a bit weird," she tells the women's publication. "I don't know if it was because business was mixed with personal or what."
"I'm afraid of being alone... I'm not afraid to admit that, you know," she says. "I just hope it's not a never-ending cycle. Sometimes love just makes you feel crazy. And that feeling that we have as girls, just to have that feeling, even for five seconds, it's like crack. I mean, don't compare it to that, but you know what I mean. It's like comfort eating."
While Ora doesn't seem to be so friendly with her ex, Ellie Goulding -- who was also rumored to have dated Harris in 2013 -- claims she set Swift up with the musician.
"I did play matchmaker, that's true," Goulding told The Sun, adding that she thought the two would be compatible based on their personalities as well as their height. "Calvin is a really great mate and he's so fantastic, and Taylor is such a cool person who I love."
Rita Ora, Calvin Harris
Rita Ora explains breakup from Calvin Harris: 'I thought he had my back'
LONDON, ENGLAND - FEBRUARY 19: Rita Ora and Calvin Harris attend the Three Six Zero and Nokia MixRadio Party at Hakkasan on February 19, 2014 in London, England. (Photo by David M. Benett/Getty Images for Three Six Zero-Nokia MixRadio)
British DJ Calvin Harris (L) and British singer-songwriter Rita Ora (R) pose on the red carpet arriving at the BRIT Awards 2014 in London on February 19, 2014. AFP PHOTO / ANDREW COWIE (Photo credit should read ANDREW COWIE/AFP/Getty Images)
BEVERLY HILLS, CA - JANUARY 25: (Exclusive Coverage) Singer/songwriter Rita Ora (L) and DJ/Producer Calvin Harris attend the Roc Nation Pre-GRAMMY Brunch Presented by MAC Viva Glam at Private Residence on January 25, 2014 in Beverly Hills, California. (Photo by Larry Busacca/Getty Images)
Rita Ora (R) and Calvin Harris arrive on the red carpet for the 56th Grammy Awards at the Staples Center in Los Angeles on January 26, 2014. AFP PHOTO/ROBYN BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
CAP D'ANTIBES, FRANCE - MAY 21: Singer Rita Ora attends amfAR's 22nd Cinema Against AIDS Gala, Presented By Bold Films And Harry Winston at Hotel du Cap-Eden-Roc on May 21, 2015 in Cap d'Antibes, France. (Photo by Tristan Fewings/Getty Images)
LAS VEGAS, NV - MAY 17: (EDITORS NOTE: This Image was processed using digital filters) Singer Rita Ora arrives at the 2015 Billboard Music Awards at MGM Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
SANTA MONICA, CA - MAY 09: Rita Ora at the PacSun And Rita Ora Celebrate her new adidas Originals Collection With In-Store Signing event at PacSun on May 9, 2015 in Santa Monica, California. (Photo by Araya Diaz/Getty Images for PacSun)
NEW YORK, NY - MAY 11: Rita Ora attends the 'China: Through The Looking Glass' Costume Institute Benefit Gala at the Metropolitan Museum of Art on May 4, 2015 in New York City. (Photo by Andrew H. Walker/Getty Images for Variety)
CENTURY CITY, CA - APRIL 24: Honoree, designer Tommy Hilfiger, (L) and recording artist Rita Ora perform onstage during the 22nd Annual Race To Erase MS Event at the Hyatt Regency Century Plaza on April 24, 2015 in Century City, California. (Photo by Frederick M. Brown/Getty Images for Race To Erase MS)
NEW YORK, NY - MARCH 23: (EXCLUSIVE COVERAGE) Rita Ora visits 'The Elvis Duran Z100 Morning Show' at Z100 Studio on March 23, 2015 in New York City. (Photo by Slaven Vlasic/Getty Images)
LONDON, ENGLAND - MARCH 19: Rita Ora atends a photocall to mark the 100th anniversary of the iconic Coca-Cola Bottle at the opening of the Contour Centenary Bar on March 19, 2015 in London, England. (Photo by Tim P. Whitby/Getty Images)
HOLLYWOOD, CA - FEBRUARY 22: Singer Rita Ora attends the 87th Annual Academy Awards at Hollywood & Highland Center on February 22, 2015 in Hollywood, California. (Photo by Jason Merritt/Getty Images)
Rita Ora arrives to the 2015 Vanity Fair Oscar Party February 22, 2015 in Beverly Hills, California.
AFP PHOTO/ADRIAN SANCHEZ-GONZALEZ (Photo credit should read ADRIAN SANCHEZ-GONZALEZ/AFP/Getty Images)
HOLLYWOOD, CA - FEBRUARY 22: Singer Rita Ora attends the 87th Annual Academy Awards at Hollywood & Highland Center on February 22, 2015 in Hollywood, California. (Photo by Frazer Harrison/Getty Images)
Rita Ora performs 'Grateful' (Beyond The Lights) at the 87th Oscars February 22, 2015 in Hollywood, California. AFP PHOTO / Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
Actress Rita Ora gestures on the red carpet for the 87th Oscars on February 22, 2015 in Hollywood, California. AFP PHOTO/ MLADEN ANTONOV (Photo credit should read MLADEN ANTONOV/AFP/Getty Images)