Pretty much the same thing happened to me, thing is. We were not in a long relationship. But i guess you could say that we cared for eachother a lot. I found out that she sent a picture of herself to someone and took Action by useing the kids face to paint to walls red & telling her friends what she did. I will admit it was wrong what i did and i shouldnt have. But hell, worked for me.

In your case, I would suggest you talk to her and see what the the hell was going through her head.

EDIT:
I would also suggest using these lines and Advice, this is a play by play:



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Narrator: Ignore her untill she comes up to you and asks whats wrong.
Her:Whats Wrong?
You: How about you tell me?
Her: What do you mean?
You:Dont pretend like you dont know...
Her: *Gulp* I dont know what you are talking about?
You: Then come talk to me when you realize what im talking about.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Do something along those lines, I mean talking to her is a decent idea. But this is her fault not yours, So dont put yourself in the spotlight. Wait untill she knows what she did & wait untill she comes up to you. You shouldnt have to deal with the Pain & Stress of it.

Best of luck, Im sorry. Please Update and let me know what you are planning on doing.

Just dump her then teabag her
only jokin,

The Right Thing To Do Is Talk To Her About The Situation
Then If It Goes Well At The End FUKK HERR
No Joke

well just talk to her if she starts hating on u say were done just say i didnt like how u did that and stuff just try to work it out if u really love her thats what i would do but good luck man

You have to bring it up, privately, and see what she thinks, please edit your topic, with your decision, I am curious.

FUKK HER BRO!!!

this same thing ting happened to me last year. Just do what i did when nobody but you and her around ask her why she would do that and if she says sorry and starts crying that means she is really sorry if she says sorry but no emotions at all then dump that means she likes the other guy that she sent the pic to.

give her a scond chance i luv my girlfreind she was the first person i had sex with and she cheated on my you live and for get soon you will be back to gether

You got off lucky bro she only sent a picture. My girlfriend i have now had sex with three other guys and somehow i just forgot about it. No wait i got even. But try to talk it out with her, thats the best solution.

-BRAVES- wrote give her a bj, hahahaahaah jkjk

Haha,

Dude have a laugh about it,

Its not the end of the world,
Try to get back with her ;)

MaRzzZ

Talk to her about it.

Like ask her questions about it.

If she starts denying it all when you know its true then I would consider dumping her.