I pretty much burned bridges with everyone in my life who was also a drug addict or a drunk. There are a few I keep in touch with but only rarely, but I don't hang around with any of them on a regular basis any more. A few years ago I rekindled a friendship with a former friend who also drinks a lot and does drugs a lot, and it was a disaster. He was constantly criticizing me, talking down to me, and harping about how much of a drunk I was - never mind the fact that he drinks like a fish himself, is currently on his 4th DUI, and is a total mess. He's a cheapskate because he's unemployed and can't hold a job, so he always shows up empty handed to parties and just assumes he's going to get drunk on everyone else's dime. He also steals from everyone around him. Then he tries to cover it all up by gossiping to everyone else about me or another mutual friend of ours, trying to place all the blame on us when stuff is missing that he stole from others. He's using us as scapegoats for what a mess he is and how miserable he is within himself. I decided I'd had enough of it, so I cut him off. Now he has no one else to blame but himself. The other issue is a lot of these people quite frankly don't want to see you get better and make a better life for yourself. They often get jealous and spiteful when they see you turning things around for yourself while they are stuck in a rut - so they will either directly or passive-aggresively keep trying to bring you down. Those people are not your friends.