I don't even see what's high functioning.
Binging all weekend, fighting with you? Really he doesn't sound like a great guy to be around.
Sometimes the job is the last thing to go. Many addicts will rationalize, look, I have a job, I can't be that bad...
He's been to AA, and it's not for him. Of course not, they encourage abstinence there!
If he's not trying to quit, (and perhaps even if he is) this is just a personal hell that you are beginning to slip into.
I'd get out while it hasn't dragged you down too far.