Could be a lot of reasons such as society told him it's ok to be gay and he went gay. Maybe he suddenly discovered she looks like Hilary Clinton and he ran off screaming. Or it could be she began to sound like a feminist and he became afraid someday she would take pictures standing with the enemy.
Conquered conquest, maybe? Maybe that's all the guy was interested and being with her for. Sad, I know. But some guys are like that.
I hope your friend moves on from him quickly. And for future reference, your friend should go slower in relationships. That way, she won't get hurt or feel as if she put out too much too fast. Best Wishes.
Simple: He got what he wanted, and that was all he wanted. Mission Accomplished, and time to move on to something else.
Or, to look at it another way: this girl let herself get used because she was with a guy purely because she was attracted to him, but without bothering to get to know him or figure out if he was actually interested in HER (or just sex/boobs).
because they're dating a teenaged guy, whose goal in life is not "build a meaningful connection with this beautiful person," but is instead "touch boobs if you can, then try to hook up with another girl and touch her boobs too."
Well girls say all men are dogs that go around humping anything they see. Guys like him are the reason why all girls think we guys are called dogs. That guy’s only aim was to get physical. As soon as he got that he dumped the girl. That was really bad from the guy’s side. That is one reason why girls are scared to make out with a guy. Hope she forgets about him.
Some guys just want sex or boob times lol. Its just un explainable, but mostly its cause we are just like girls when it comes to relationships we are very picky only difference is guys aren't really picky when it comes to sex or make out time lol.