I've had a few non-drinking friends over the years. Some I lost because I lost touch with them - I'd met them at university, and when I left we gradually (or not so gradually) drifted apart. How many I lost because of my drinking, I don't know. I doubt I ever will.
That's the thing that bothers me. How much have I lost through drinking? Apart from 25 years worth of memories... I don't know.