tjol, it's hard to see what the positive things are that you might be getting from your relationship w/this "friend." Have you done any reading on codependence? Many here recommend "Codependent No More."
Clearly it is NOT your fault that he has continued to drink. The saying from Alanon is that you didn't Cause it, you can't Cure it, and you can't Control it--the 3 C's.
Have you looked into Alanon for yourself? What you are describing sounds very, very unhealthy for you and rather than worry about him and what he wants or says or does or does not do, my concern is for YOU.