I sent you a PM in reply to yr mssg but it's probably best to answer here
I'm not really qualified to tell you what to do - noone here is - although I think your family and your sponsor are trying to look out for you.
A week sober is great but it's going to take many more weeks I think, for you both until you feel secure in recovery.
It might be best for both of you to focus on yourselves for a bit.
is your ex coming out of hospital soon?
why can't he find himself somewhere to stay for the moment?
it could be good for him to stand on his own two feet for a bit, as well as good for you too?
D