I wish I had some great solution to what you're going through. Went through a similar thing a long time ago. Thime heals most wounds. The best thing I did was put the past in the past and move on. I could do that a little easier than you, since we didn't have any kids and I didn't have to see her.
As far as going out and gettin hammered, it was an easy temporary solution, but didn't solve anything and had the potential to make life a lot worse. People do stupid chit when they get liquored up and usually regret things later. Alcohol is a depressant and will often make you feel worse.
Like I said, put the past in the past. The best way to get over an ex is to find new prospects. Good Luck.