Pete Wentz is finally ready to talk extensively about his painful drug addiction past.

The Fall Out Boy guitarist, who recently reunited with his band after a very long hiatus, opened up in the latest issue of Rolling Stone about his painful past struggle with drug addiction and subsequent relapse right around the time he separated from Ashlee Simpson – and Breaking Celebrity News has the details.

Pete, who was abusing prescription pills – Xanax and Klonopin mainly – explained that he “tapered off” when his son Bronx was born in 2008, but when the band went on hiatus in 2009, he suffered a bad relapse.

“I was probably physically and mentally addicted,” he admits about. “It started from insomnia and anxiety from flying, then it spiraled.

He and Simpson separated shortly after, filing for divorce in February 2011, and things went from bad to worse.

“I felt like a loser already,” he admitted. “I’d basically gone from being the guy in Fall Out Boy to being the guy who, like, hangs out all day. I didn’t see how I’d ever come out on the other side.”