I forgive my father for his alcoholism. I don't forgive alcoholism. And in my adult life, I can't maintain a relationship (romantic or professional) with someone who drinks heavily. It's not good for me.
I have been in relationships where drinking was more a part of our fabric. I was more of a drinker in college, and I recall many a buzzed afternoon on my roof deck enjoying some summer rum punch. Today, that sounds awful, but it's not because I don't like a buzz every now and then.
If drinking is a little like Ambien, I do understand the draw towards daily drinking. It's not for me either, never has been, but daily Ambien, I could see how I might enjoy that if not for the side effects that it kills my hopeful attitude the next day and has me making promises my actually emotional state won't let me fulfill.