Hey Newtolove,
Some of these people are being a little harsh with you, in my opinion. All of us have been there, especially in high school. You think it's the end of the world, but trust me, it'll be OK. It is sacrificing some of your self-respect to stay with this girl for the final two months when she's being so inconsiderate of you, but ultimately the choice is yours. You can do better, and you will. College will be a life-changing experience, but as long as you stay open-minded and try to be outgoing, you'll be fine. There will be other girls, I guarantee it.