Yes, it's wonderful that you are at the end of this sad relationship.
"Civilians" try to figure alcoholics out buy using logic and it never works. Alcoholism is a mental disorder, we think differently. "His highness the child", "enormous ego and low self-esteem", these are a few ways of describing an alcoholic. Addicts are only involved with one thing: our drug of choice, whether it's alcohol, pot or pills. We're destructive, self-destructive, self-centered in the extreme.
Some of us do change, we become good friends, lovers and spouses. But it takes a lot of hard work.
The only thing that matters is that you've started recovering yourself and have an excellent shot at having the life you so richly deserve.
Happy New Year!