Am I being toxic?

*Me and this dude are trying to be friends after a year of dating and we lost our virginity together*

I have a question for you guys. I probably shouldn’t even be talking to this dude anymore but alas I can’t seem to let go.

Just a backstory: I am a pretty insecure person. It caused a lot of harm in my past relationship. I am still insecure to this day. Not only that but I’m not over my ex and there’s still this littttttle piece of hope that we could be together one day. I also deal with anxiety, depression and so much stress and this makes it worse.

So me and this dude broke up and afterwards he fucked this girl that he ended up just wanting to be friends with. Imagining him being intimate w a girl like that hurts a lot and I’m pretty insecure that she looks and has a better body than me.

I told him that it would hurt Me a lot to be in the same room with her and I would just compare myself because I’m insecure about myself and idk hurts he’s with other girls. His response to me not wanting to go to the same party as her UNTIL IM HEALED AND MOVED ON was that it’s weird or that I’m toxic.

So my question is, am I overreacting and being like a pussy about this? Am I being toxic?

OR am I being smart and taking care of myself by backing off until I’m ready to face that situation? You know for my mental health??

*sorry if this is in the wrong group. I didn’t know where to put it*