My [21F] boyfriend [22M] currently has a class with a girl he met on Tinder before we started dating. He told me that nothing sexual had ever happened with her and that there’s nothing to worry about. They sit together in class and I can’t help but feel jealous and upset about it. I know nothing may have happened between them but if you meet someone on tinder there is an obvious attraction there. At this point this is an impossible situation to fix because if I’m not crazy for being jealous then it doesn’t matter because he won’t not be her friend. But then if I am crazy for being jealous then that fucking blows because I don’t know how to stop feeling so upset about it. SOS.