Hi Blondtheory,
Sorry for what brings you here. I'm going to guess your having a hard time moving on cause what he did, did not make any sense to you. How could someone who professes their love for you, jump into a new relationship in a blink of an eye. For the alcoholic it's looking for the path of least resistance. They will either convince you that you have the issue with alcohol and they don't have no problem with it. In this case he could see you had issues with his drinking and found someone who was fine with drinking their life away. I know it hurts and is confusing the way he acted. But with time the hurt will fade. You can gets lots of knowledge here about alcoholics and the way they behave. I had no clue until I came hear and learned from all the helpful people here. Keep being strong and have a great day.