Hiya Barbdee,
Well, the bottom line is nothing changes, if nothing changes. He has a warm soft place to fall...that would be you, so why bother trying to attempt sobriety?
The time just has to come, where we put up a real boundary that says I will not tolerate your abusing yourself, and your family, and give him a week to find other lodging.
Otherwise this may be your life for a LONG time.
Hugs from one mom to another...