My girlfriend cheated on me?

[Alex]

So we are both 15. We've dated for a year and a half. I love her with with all my heart. But just a few days ago I had a basketball game. After the game one of my friends told me that my gf was in the bathroom making out with a 10th grader. So I'm starting to freak out now cuz I thought it wasn't true, but then I looked up the guy who my friend said it was on facebook. And his profile picture is him making out with my gf....

[Joshua]

Beat his ass up bro and then dump her sorry but that's fucked up....

[Peace]

You're so young!! Don't worry about this, you will have so many other girls in your life to worry about. She's young and dumb, you can't expect much.

[Mike]

yup. if there's a picture, it happened. Confront her about it, dump her, move on. Plenty of other great fish in the sea. Carpe diem. You are too young to be in this situation. Good luck.

[Decapitator]

Dump her man. Move on. You're young, so you have a ton of time to find the right girl.

[Jay]

break it off dude you can,t win in a unfaithful relationship and she is upset cause she got caught and the only way she will learn is if you dumb her I understand you are hurting and when you do dump you will know it was the right thing to do and the guy she cheated with that may not be the only guy she cheated with cheaters get any and everybody your not safe with her find a new girlfriend

[Nature Lover]

Lucky you, since it happened when you are still single.
If she did it once, she will do it again, a sign she has no respect for your devoted love.
You need to break up the relationship, which is going nowhere. It will hurt (you) because of your devotion. However the crush will pass and become a memory.

You can not change a person, especially her type. If you try to, you will be hurt even more. Perhaps it was her way of saying the relationship was over, especially when advertised via Facebook (an idiotic action).
Learn from the experience, and go on looking for a girl of a higher standard whom you can trust.
Now you understand what all the songs about "Breaking my heart" mean (both males and females, lol).
You will survive, and some day soon will be glad she did that for your sake.