I got mad at my boyfriend because I found out he said another girl was hot. He said it was a joke. What should I do? Am I too dramatic?

We've been dating for more than a year and we've been living together for almost a year. He plays online games with his friends and as I sometimes use his phone (At first because it was better for work, and now because I don't have a phone), I constantly find girls screenshots, I tried not to pay attention to that but once I felt obsessed about one pic because it was from an usser on the game he plays, and following the girl pic it was another screenshot with her ussername. I looked just for the image on his group chat and found out he sent that and wrote "Omg I would totally play with her" following by the drooling face emoji. I've been through that before and ended up being replaced, so and old wound opened, and now even bigger because my boyfriend is the real love of my life. I asked him about the screenshot and he lied to me saying it was a girl that looked like an old classmate, then I confessed and he just got mad because I read his messages. I constantly listen to him playing with his friends and a few times I overheard them talking about their ex's, also he used to talk to a lot of girls prettier than me, so I constantly feel in danger to be left. Am I being too dramatic? If this is a real problem, how should I start solving it?
I got mad at my boyfriend because I found out he said another girl was hot. He said it was a joke. What should I do? Am I too dramatic?
Post Opinion