I Find Honesty and Trust Very Important In Any Relationship

My bf and i hang out w his friends alot. Apparently (my bf's friend's wife and her friend) told him i bad mouth him. He wont tell me what they said. I think they prob twisted something I've said... Cause i told them he dont let me in on plans till the last min..so im not sure if its that.
But my bf to this day won't tell me what they said.