Welcome Km
Sorry for your situation. being with an alcoholic is a battle. You've done the right thing so far by leaving. I would suggest getting to Al-anon. It will help you to understand alcoholism and co dependency. Your happiness and serenity is your priority.
I would set boundaries with him, don't contact me until he has been to so many AA meetings or has so many days sober. Never contact me if he is drinking. Remember you can't make him stop drinking just like you don't make him drink. It's his disease to deal with you don't have to enable it. Good luck