Sparrow
My addict son is 34 and it never works when he moves home, and I would not allow it again.
I know the pain of worrying and being a mom, but in the end they have to live their own lives - whether we agree with how or where or not.
You have received some good advice here on "detaching" and I would also recommend some Al-anon meetings for you. 12-step saved my life and my sanity.
We cannot change them, but we can change us and learn how to live happy healthy lives regardless of how they are doing.
My prayers are with you.