My ex is an alcoholic and literally drinking himself to death

My ex is Irish and blamed it on "culture" but would literally drink so much he wet the bed, would abandon me at places, and would always break his promise not to get too drunk. He's also been shitting blood for a year, at least once a week. I'm talking about a toilet full of blood. He moved to Australia for work a month, and ended up at an urgent care after a night of drinking 10 days ago because his stomach hurt so bad. They diagnosed him with Alcoholic Gastritis and ordered a battery of tests, including a colonoscopy. He has not done any of the tests, and tonight, he went out drinking after promising he wouldn't.

I am a shell of the person I was 2 years ago. I feel powerless to help him, and because he doesn't need to drink every day, I never really thought he was an alcoholic. But he could bleed out tonight after drinking. I don't know what to do. I love him, he has so many great qualities, but I can't carry this, it's killing me. I need help and I don't feel strong enough to just cut him off.