Well, he's dead, and due to MH problems (I see in hindsight) he treated me very badly. However, I would never wish anyone the lifetime of pain he must have had after I left him, even on him. I was told he died of an accidental overdose age 47ish. I would say:
Get therapy to get over your BFF who died when you were 18
'I cudda been a contender' is not an appropriate thought pattern for someone earning 2k a week at the age of 24; you are already far more than a contender (25 years ago too)
Your adopted mum is a huge narcissist who will cause you and your other brother nothing but a lifetime of toxicity and pain; cut her off, then get therapy to understand why she treated you the way she did, or just read up on narcissists
(His brother did cut her off, he also developed a drug problem)
Drugs and alcohol are not therapy, go to therapy, stop mistrusting it
Your sex addition is due to MH issues and will also cause you a lifetime of pain
You probably have manic depression and require some medication (bi polar? They used to call it different things)
So did I mention getting therapy?
It's quite sad really. He had very kind tendancies and was wickedly good fun, but his upbringing and childhood loss ruined him for life and he didn't have the emotional tools nor inclination to get himself better.
I am kind of glad he wasn't around for Bowie dying because that would have pushed him over the edge - purely that on its own.