I really don't have any drinking buddies left. After I got married I started to hang with friends less and less and the last decade or so of my drinking was alone and/or with my wife.
My wife still drinks and we maybe hang with people that drink once a month or so and so far it hasn't been an issue.
The way I look at it is that a true friend will understand that I can't drink anymore - anyone that would judge me because I don't consume alcohol isn't someone I need in my life.