Courtesy of Seventeen
"I'm not gonna lie. I was self-medicating," the singer/actress tells the mag of the issues she faced in the past. "I was doing things like drinking and using [drugs], like a lot of teens do to numb their pain."
However, after undergoing treatment, Demi says she's turned over a new leaf. "I don't drink, I don't do drugs, I don't throw up after my meals, I don't starve myself," she adds. "There's nothing that I do that I feel ashamed of."
During her tough times, Demi says both Miley and Selena were there for her. Their friendships are very different, but despite any arguments they may have, they "will always be in each others' lives."
"[Miley Cyrus and I] are very strong-headed, so when we fight, it's brutal and we're like, 'We're never going to be friends again!' Then two days later, we're like, 'I love you and I miss you!'" Demi explains. "Selena [Gomez] and I, we never fight. She's not a confrontational person at all. Both of them will never leave my life no matter what happens, because we've been through so much together."
Demi appears on the February cover of Seventeen, which hits newsstands on Tuesday, January 10. For more quotes from the 'Skyscraper' singer's interview, visit Seventeen.com.