If you feel pushing him is what you need to do, then do it. YOU are the one living in the situation and you are the only one who can decide what is best for you, right now. Most of us had to try to do "everything possible", too.
I have to be honest, though. Almost all of the A's I've known who were forced into recovery did have the seeds of recovery planted, but it took many more tries before they ever "got it", if they ever did.
I truly hope he chooses recovery, but I would still be working on plan B if he doesn't.
Hugs and prayers!
Amy