It's almost impossible to have a healthy relationship with a girl my age (19) My Las gf flirted with other guys constantly right in front of me. One time we were about to go to a party and she looked really hot. Jokingly I said "I'll smacking guys off you like flies all night" she got angry and said "or you could let me have my fun" after she was talking to her friend in front of me about the difference between sex with me and sex with her ex bf, I broke it off. All I said was that we had different thoughts on how someone should act while in a relationship, and now she and all her friends say I'm an insecure, controlling, asshole. Would it be the same if I did everything she did? I doubt it