I am SO sorry to hear of the setback....
I am one to never want to let go of hope......but I can only imagine how hard this is for you to be under the same roof.......
I sure hope he will go for the rehab.......maybe it will inspire him to be reminded of the many MANY talented, smart, and successful people of all walks of life who have gone thru rehab..... I hope he doesn't feel 'isolated'.
This happens to the best of the best of people.
It would be such a sad reality for him to lose you. But I do understand that there is only so much you can do.
Does he have friends ('good' friends) that are backing him up in getting into a rehab. If he gets encouragement from them, the more the better.
I hope he is willing to set himself apart from the people in his life who embrace his drinking.
You are giving him the 'ultimate' ultimatum.......and it's probably the best thing you can do for him at this point.

I still believe he can get his life back. I've seen it happen.
Please know you are always in my prayers.....

If you ever just want to talk 'off the main board'.....feel free to send me a PM and I'll be happy to share my personal experiences in more detail of what I've learned and experienced thru the important people in my life who have be entangled in this rut.....
There ARE ways out.
I pray that he realizes that it's the true 'manly' thing to do......to do it for himself....but also for the person who's stuck with him thru all of this. YOU!

I'll check with you soon if I don't hear from you
Your Friend
Rae