Okay, here's another thought...he tried to "get my goat" and test me on a claim I made. The claim was that I would not react with jealousy to acts he would do to try to induce that jealousy, ie. flirting with other women. I succeeded, and he gave that up.

So, now he has this male friendship thing going, and it's pissed me off. I've said nothing about it. I know he gets along very well with men. But this one has me a bit stymied. lol. So, it seems like it's more important than I am. I have some guesses as to what's caused it, but the focus here is my reaction. The best thing I can think to do to handle this situation is to not react. Yes, I am a little jealous, but I don't mind other male friendships. I see that even though they are showing some tightness of bond, my SO is going to pull his usual, and the friendship will wane or disintegrate. He does have some lasting friendships. For instance, his flatmate is his best friend from childhood. But, I think the expectations this, er, young man has may end up tanking it.