First of all, welcome to SR! I agree with the others and educate yourself as much as you can about alcoholism.
Remember the 3 C's-you didn't cause his drinking, you can't control it, and you can't cure it.
Dr. Phil says the best predictor of future behavior is past behavior.
You already see a clear pattern with him.
Is this what you want in a partner?
I would also recommend finding some Alanon meetings in your area as they will help you focus on you, instead of him, and perhaps clear up some of the confusion you are feeling. :ghug