Welcome to sr. I think you did what you had to do. I'm new at this and I dont want to give the wrong advise but I just want to welcome you and let you know that you have come to the right place. Stay strong. I would maybe consider trying a meeting like al anon, nar non ect. They seem to help me when I need it. My ex abf was/is addicted to pot and coke. I can't tell you how many times his mom and dad kicked him out. I know she went through the same things you are going through. Just remeber you can only do so much the rest is up to him. You didn't cause it, You can't fix it, and you can't cure it. Stay strong.