Who knows why he ended the relationship the way he did? I was thinking he was a coward and just could not face you with such news, thought he'd be able to email you and be done, just ignore you from then on. Your anger at such treatment is quite appropriate, I believe, and I would just use that and be glad you are rid of him. I would not apologize for going over to confront him, wine or no wine. If you feel an apology of some sort would make you feel better, I would apologize (perhaps for confronting him when drunk as opposed to sober, but not for confronting him or being angry/lashing out). . . in an email