You're right, he doesn't get it, he wont get it. Luckily, your recovery isn't dependent on that at all! Glad you're here. I had that sort of ultimatum a few times myself. Really wished I would have made life changes the first time I realized enough was enough. You'll love it here!!
I also grew up in an alcoholic home. I swore I'd never 'be like that'. Ah well.
Welcome