Hello,
You're right, his main concern should be getting help for himself. You do not need to go thru abuse because of his problems that he isn't getting taken care of. It does no good for you, as I have been thru a lot of abuse.
To me, the first punch should be the last. If he's not willing to get help, or is and it's not working, he's not worth it. It will only ruin your self-esteem and your self-worth.
Take Care.