Hello wondering1234: I don't know as there is much of anything I can offer here.

From my perspective, all you can do is to be present & let your friend know you're available to talk if-&-when he wants to. Beyond that the ball is in his court, as the saying goes. Perhaps other members, here on PC, will have better suggestions to offer.
I see this is your first post here on PC. So

to PsychCentral… from the Skeezyks!

May the time you spend here be of benefit.
PsychCentral is a great place to get information as well as support for mental health issues. The more you post, & reply to other members’ posts, the more a part of the community you will become.

Plus there are social groups you can join & chat rooms where you’ll be able to connect with other PC members in real time (once your first 5 posts have been reviewed & approved.) Lots of great stuff! So please keep posting!