Am I being too emotional and over reacting?

Sandra
I came home from work and my bf bought a whole new outfit, new shoes  and says he's going out with his friends tonight, they both have girlfriends, the one doesn't care if he has a gf he will cheat on her but the other is in a serious relationship. Well I'm really upset. It's 10:30 they haven't left yet and he says he doesn't know where they are going. I'm 8 months pregnant and really upset about this. I mean he never goes out with his friends but I guess it's the way he's handling it like idk. I'm really upset tho.