Well, i'm not very proficient in this kind of things(asking questions online), but i wouldn't mind some tips. So there's this girl i got antiquated with and unlike many other girls, I just hang out with, i really liked her. So we went out, had a couple of drinks, spent wonderful time. The next time we went around with our friends, and there was this strange guy, from her hometown, whom she knew for a long time. There was also this girl(she's my good friend), and we were friendly flirting with that girl(really friendly!), and to my surprise, the first girls started making out with this strange guy, like kissing and all the shit. Of course i got upset took my friend, and we went clubbing till morning. So my question is can someone explain me wtf happened?!