After Dday, I went no contact with almost all of my old circle of friends.
I had been hanging out with solid friends before but they were slowly ejected as I got deeper into things like drinking.
After Dday I renewed friendships with those that I had ejected, these are solid guys who are friends of the marriage.
There are still two people I maintain a sort of close friendship via email. Both of them had told me to stop what I was doing and work on my relationship. I contact them infrequently and they are pulling for my wife and I to work it out.
But yeah... about 3 years ago I swapped out my circle of friends with those who helped enable my drinking and drug use.
I wasn't a huge drug user, I smoked a bowl once with one of the guys, but after DDay I texted him that I was having issues at home and was off Facebook etc and that I had things to work on.