Honest truth here.
An 11 day binge in itself could just be a touch of the "poor me"s.
But the rest of your story makes it clear it isn't.
He is not going to stop drinking until the time is right for him. That may be before his death, or it may coincide with his death.
If you leave, that may be what makes him decide - if he doesn't fancy his life without you (still all about him, you notice) then he made get the help that he will almost certainly need to beat this. Or it may not. He may just carry on.
All you can do is decide whether you want to be in the audience or not.
Sorry it's not better news.
Also, whether you stay or go, his debt is his debt - no reason to assume he will stop paying off your shared debt if he leaves.
I'm a recovering alcoholic (and male if that counts for anything.) When I drank I was unmarried and childless. My family now is more important to me than anything apart from my sobriety.
But I know that, if I was to start drinking again, I would step over my crying children to get to the off-licence before closing time. When I drink, NOTHING is so important that it will stop me drinking.
I'm sure this isn't good news, but hope it helps - PM me if you want to discuss privately.