Hi, and welcome!
You can wait three months and see if he relapses. You can stay with him your whole life.
The point is, he is a man that is addicted to alcohol.
He is a man that is not treating his alcoholism.
He gets trashed.
He pees himself, and I would guess the bed and the floor.
He might have times of temporarily quitting.
To me, it sounds quite serious.
So given all that...
Does that work for you?
That is the question to answer.
It's not about how much you love him, or what his great qualities are, or how scared you are or how much he needs you or how he might change.
Does how he is right now work for you? Because he is being who he wants to be.
You might want to check out Melody Beattie's book Codependent No More.
She talks about respecting the A as an individual. Feeling pity or wanting to save them from themselves (because they might do self harm, for example) is not respectful.
They ARE an independent adult that CAN take care of themselves and it is our job to TRUST that they can do so. They might not trust that they can do so, but how can they ever practice self care if we baby them?
Welcome, I know this is tough. You can get oodles of support here.
Hugs,
peace