stiney,
Welcome to SR. Your post is so filled with pain. I am the mother of an addict son (who is currently sober,) not a spouse. But I wanted to acknowledge your post and let you know you were heard.
I can only speak for myself, but AlAnon is a great place to find face to face support and to learn to take care of yourself. You can't change your boyfriend, you can't control him, nothing you do or don't do will make him drink, take drugs or not drink or take drugs. That is his responsibility, his life to take care of.
You are young, you have your whole life ahead of you, you should be happy and focusing on your future. Try reading Codependent No More by Melody Beattie and getting to an AlAnon meeting - for you, not because your boyfriend "made you go".
Good luck, there will be many others along to respond as well.