So the guy I'm seeing is letting someone he used to hook up with all the time move in with him.

He and this person have known each other for a very long time and they have actually come out as trans and are currently identifying as nonbinary.

I wouldn't be as uncomfortable about it if he hadn't told me that he was still hooking up with them after they started presenting as a guy; he's also made it kind of clear that he still finds them quite attractive..

I'm just wondering what some of your opinions are on this matter?? Am I justified in feeling so uncomfortable??