I really do hope that he will commit to long-term recovery for his own sake. Active addicts are selfish in their own way. You told him how upset and sad you are, and his response was all about him "come hug me, me, me, me".
In true, early recovery, the person's only job is to work on that recovery. That seems to typically exclude family and friends until after a certain period of time.
If he really is going back to live with his folks and is going to work a real program, he's going to be very busy. Plus, the sad truth is, you can't control how they are going to treat him. We have not control over our fellow codies just as we have no control over the A's in our lives.
He will make it, without you holding his hand. I hope you will take good care of yourself. Are you sleeping well, eating well, having fun with friends? Just some things to think about.
Hugs and prayers, HG