I have a serious problem !!

If Ты care about her, don't break up with her. Calmly explain your side of the story. Don't deny sleeping with that other girl, it will just make things ten times worse. Accept it and admit it. If Ты didn't cheat, make sure Ты make her aware of that. Explain that your ex is just starting drama. If Ты care about your current girlfriend and want to stay together, make sure, again, she knows it.

nah u shouldnt break up with her, but u should explain y u did that. if she wants to break up with Ты then thats the consequences u face. but i wouldnt go n break up with her just cos she is pissed that u did something and someone else is talking about u.
LOL или Ты could just deny it! lol

dont break up with her, instead explain what went down if she like u she will understand

ya. that is one of the qualities of many (not all) girls i JUST HATE! telling everyone everything unnecessarily ! and now i realize that the quality is same in the whole world.THEY JUST CANT KEEP SECRETS!!!!! ....OK this was my personal anger.so,i would say Ты r in deep water! r surrounded by crazzy people! hey, do maintain Ur relationship with whom u want to.try not to hurt anyone.

dont break up with her!

first u shud try to work it out wit ur gf and if it doesnt and she wont listen then i say forget her :)....:P