If and when he is ready he may come to you. I am not familiar with the relatonship you had? Did you drink or use with him? Sometimes they are just angry because they are going through and accepting so much about them selves that they were in denial with for a long time.
He is dealing with a lot and I would step back for sure. When he is ready he knows where you are. Maybe telling him you wanted to be there for him and help him through was to much for him