Monteith's mom speaks out for first time about son's death

For the first time, Cory Monteith's mother, Ann McGregor, has spoken out about her son's death. She told "Good Morning America" on Thursday that she's just now beginning to accept that he's gone.

"The loss is horrendous. Until three days ago, I couldn't look at a picture of Cory," McGregor said.

The 31-year-old 'Glee' star was found dead in a hotel room in Vancouver July 13, 2013.

British Columbia's Coroners Service released his cause of death: "That cause of death was a mixed drug toxicity, and it involved heroin primarily and also alcohol."

Monteith had been open about his struggles with addiction, and in the interview McGregor revealed her son had almost died from his drug use at a much younger age.

"Cory was 15, he did a code blue...He had a lot of emotional things he was trying to figure out," his mother said.

In 2011, Monteith told Parade the turning point for him was when he stole money from a family member to buy drugs. "'I was done fighting myself. I finally said, I'm gonna start looking at my life and figure out why I'm doing this,'" Monteith said at the time.

Eventually, Monteith scored the role of Finn Hudson on "Glee."

When asked what she thought of the special tribute episode "Glee" did for her son, McGregor said she hasn't been able to watch the show since her son's passing.

McGregor wasn't the only one remembering Monteith this week.

On the anniversary of his death, many of his co-stars tweeted out tributes, including Lea Michele, his girlfriend at the time of his death, as well as Amber Riley and Kevin McHale, among others.

As for McGregor, she told "GMA" she's still in awe of her son's talent and that she always will be. The full interview can be found on ABCNews.com.

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