Landlord - my opinion is to stick around if you think you have a drinking problem even if it may be relationship problems. I have experienced similar heartache in the past and once drank myself into oblivion for 3 straight days. When I talked to my boyfriend about it (not the guy I am married to now) he just said "you shouldn't do that." It did nothing to make him feel any different toward me, it just made me feel sad. I felt the familiar longings and all that stuff, and in the end, it made no difference. He felt the same about me whether I drank or not (or rather, didn't feel the way I wanted him to feel). I can look back now and see that was the beginning of my serious drinking and it only got worse from there, even though the relationship was over and he moved on. So my opinion is stick around if you think that the ex problems are causing you to drink. It was the beginning of my downhill slide. My humble opinion only.
KC