hi Mimic and
to SR. I'm glad you found this place. I hope you keep coming back here for support.
I notice in your second post you mention that your ABF wound up in a psych ward subsequent to your break up with him. You also mention that he's his ill mother's only child. These are sad things, granted, but they are not your responsibility. Your ABF is a grown man who is CHOOSING to dive head first into a bottle every day.
Remember,
You didn't CAUSE the drinking
You can't CURE the drinking
You can't CONTROL the drinking
Please don't let yourself get held hostage by what might happen to him should you part ways. He may very well blame you for whatever happens to him (blameshifting is a common alkie tactic), however try to remind yourself that every. single. time. he drinks, he is making a choice.
Please find some Al-Anon meetings and attend a few. You need some support.
Keep posting!