What do you do when your girlfriend of 2.5 years leave for med school, made out with another dude there 2 months into her first year, told you that she made a mistake and that it would never happen again, dumps you a month after and then get into a relationship with the same dude she made out with…
The girl sounds shady, no getting around that. Best thing to do is completely forget about a girl like this IMHO. Block her emails, FB, everything, and don’t talk to her again. Not sure about this girl, but some girls actually dig the attention, so don’t play that game.
Once you make up your mind to cut her off completely, you will feel a million times lighter, trust me on that. Chalk it up as a learning experience. It sucks now, but if a girl ever pulls a similar stunt, you’ll be ready for the sob story that it was just a “mistake” which will “never happen again.”
It’s a big world with billions of ladies in it. For now, I’d focus any bad energy into something positive…studying new skills, hard work, strengthening yourself, friendships, etc. You’d be amazed at what a motivator cutting off a shitty girlfriend can be. And when you’re so busy building your new life that you no longer care about the drama, that’s when a new (and hopefully nicer) girl will usually come along.