I see your situation clearly as I’ve been in a similar situation.
we went to relationship counseling and it worked ok. The therapist worked on her assumptions indicating how unfair it was for me to be accused of something without a shrewd of evidence.
A marriage prior to that relationship involved getting the silent treatment from her over te pettiest issues. This, using silence as a weapon is considered a form of narcissism. Google things like-
Grown adults should not use silence in such ways however there is a short period of time for space that is acceptable.
beyondblue topic relationship strife? the peace pipe
We all have our own responsibilities and it isn’t yours to find him friends - nor is it your problem to enjoy yours.
If the others you go out with include their spouses then ask him to join you- if not, we’ll again not your problem
I don’t like suggesting a trial separation but often just the mere suggestion could work. It might shock him into talking and you can gauge his reactions.
Such a suggestion could be put to him in front of a GP.
Food for thought. Feel welcome to remain on the forum to seek more opinions and have this thread ongoing through this hurtful period.