Under different circumstances I'd have if you've talked to him, but it sounds like you've tried and gotten nowhere. I understand that this might seem like a frustrating answer, but I think the best you could do is give him some space for a little while. Not necessarily leave him on his own wherever you two are, just find other things to do instead just for a bit so that he can have time to figure it out.

I know. Sometimes friends just go through growing pains. Like you said though, the two of you will work through it.