Hi Starbright;
Welcome to SR
It sounds like he isn't done drinking from what you've said.
As a former alcoholic myself, I can tell you that only he can choose recovery
no matter how much you love him.
I would certainly not advise blending families (especially if you have children already) and formalizing life with an active addict.
I would wait to hear back and think long and hard about this--sounds like he's going down and not up at the moment--nothing you can do will stop that--it must come from him.
Wishing you the very best in a difficult situation