Oh my goodness this post could have been me six years ago.
I can't make any promises about him or the relationship. I know that you can get better though.
Al-anon really really helped me. It took a lot for me to go, but now my only regret about it is that I did not go earlier.
There is a saying in Al-anon known as the Three C's
You did not CAUSE IT
You cannot CONTROL IT and
You cannot CURE IT.
Watching my loved ones actions instead of what he told me really helped me.
I read a lot about the disease, and tried to be as gentle with myself as I could.
More will be along soon.