That's usually best. Just go about your business. Be open to him. Ask him normal questions or tell him normal things ("I've got to run to the store. Be back soon!") but don't push or try to talk to him about the ST or other serious matters. Hopefully, he'll come around in time.
In the meantime, while he's coming back to baseline, do things for yourself. Spend time with friends and family. Do things you enjoy. That will help keep your own energy up.
Hang in there and keep posting!