You definitely did the right thing. Destructive people who refuse to get help eventually burn all their bridges. They either wind up in prison repeatedly (and perhaps court required treatment) or face facts and invest the courage and time and energy it takes to get better. Some people are too proud or think they're not like the other "sick" people and that's their excuse to not seek help.

It's his choice. But you made the choice that was best for you and in the long run for him too. Being abusive has consequences and as you know, it was never your job to fix his problems to the detriment of your own life and happiness.

Go you! I'm sure you're an inspiration to others on the site who are in bad, draining relationships.