Yes, the seme is being a possessive jerk. But to be fair, I can see where he is coming from. The uke is treating the seme like a dirty little secret. He tells people that he is single and pretends like he is a womanizer. He should have told that one jerk and the girls that he was seeing someone. Didn't have to tell them it's a man if he is not ready to come out of the closet. If my partner didn't at least acknowledge that he was seeing someone, I'd be pretty hurt and pissed too.