I think we all hold out hope that they're coming to their senses. I did this countless times. Finally, I just got sick and tired of being sick and tired. I was wasting my time on someone who was, for all intensive purposes, using me. He uses booze to numb himself. He uses people to get what he wants when he wants it. I don't think my AH was much deeper than that.
Although I kept hoping there was more there ....
You treated yourself well and got on with your day. I'm sorry you had to go through the disappointment, but it sounds like you are seeing him for what he is and not taking it personally.