I think you should do as he asked and leave him alone. There's no way to know if he is really trying to get himself straightened out or if he just wanted to get away from you because you were interfering with his drinking. I know that sounds harsh, but it really is the only way to look at it.
There is nothing you can do to help him embrace sobriety. You cannot force him to be ready for it...that must come from inside him. If he wants recovery, he'll do whatever he needs to do to achieve that whether you are in the picture or not. To be completely honest, it doesn't sound like he's really ready to do that.
Welcome to SR. You will find a lot of support here for YOU. Please read the stickie posts at the top of the forum. There is a lot of very good information there. One thing to remember is...you did not cause it, you cannot control it and you cannot cure it. The only person you have any control over is yourself. Take care of yourself and allow him to figure out his own life.