Bren have faith! Do NOT let him come home.
My parents finally put their feet down when I was 33 1/2 years old and said NO MORE and they meant it. When I called on the phone (there was no caller ID back then) they hung up and if I came to the door it was closed in my face.
It took me another 2 1/2 years to find recovery and the last 1 1/2 years I lived on the streets of Hollyweird. It was the right thing to do. If they had continued to 'rescue' me I don't believe I would have found recovery. That was over 27 years ago, and in the ensuing years I have worked with many that were like me, their family and friends FINALLY SAID NO MORE.
Have you tried Alanon for you yet? It really is a great program!
Please keep posting and let us know how YOU are doing, we do care very much!
Love and hugs,