Yeah, I would give him a chance to check in with himself and then talk about his side of it. He has always been a little plodding and vague until he figures it out for himself, but that's not necessarily a bad thing. I would bring this up at the top of the hour next session and shake it loose from him because at that point, he needs to really say something about what's going on and not leave you in this state of knowing there's a difference but not what or why. For anyone who's had a parent with mental illness, or who is abusive, the not knowing, but sensing, can be hell. We need something solid to grab hold of, even if it's not good news, otherwise, our minds will imagine the worst. He owes it to you not to leave you in that state before your separation.