my (20f) boyfriend (20M) went on a date without me and I feel like I’m overreacting.

my(20f) boyfriend(20m) and I have been together for about 2 months now. I know it’s new, but I thought we were okay. <br><br>Yesterday I was in his car and I looked through his messages and found out that he went on a date with someone else, one of his friends. <br><br>It was a coffee date and at first I didn’t think it was weird because they’re friends. I read on though and saw their messages as recent as yesterday and now I’m jealous. <br><br>I don’t know if I should mention it to him but I really feel jealous. I don’t like this at all. <br><br>What do you think I should do? I feel like I’m overreacting<br><br>EDIT: I don’t have any pics because I don’t have chambers premium but the girl is sending him pics of her in lingerie in his car. I feel so bad.<br><br>EDIT (for everyone): he says he’s been seeing her behind my back and he’s been using me as a rebound. he’s going to tell her tonight then he’s going to come clean with everyone else.