Lost my virginity. upset at myself. upset in general.?

I dont see why you would have sex with him in the first place if you knew he had a gf :/ smh all guys are the same. Even if they have gf they still cheat :( how would you feel if your bf was having sex with his best friend and she already knew he had a gf. I would kill him. I wouldnt want his *** anymore. You did screw up bad.