My husband had to file for divorce and get temporary custody of our son before I decided to stop drinking....although I think I was drinking to numb myself in a painful marriage. Your gf has to want to stop drinking. And yeah, I wouldn't be buying her booze. Let her walk to the bar. So what if she gets pissed -- just ignore it. You can't have an argument by yourself. Avail yourself to the friends and family section here...and think about whether this is really the way you want to live the rest of your life.