WHY DO I FEEL THIS WAY!?!?

I have a simple crush, SIMPLE. I knew she was too good for me and I'm not her type but every time, EVERY DAMN TIME! I Just want to be with her... And every time she talks about someone else who (I don't know if it's true) she likes and I just stay there smiling like nothing is wrong, IT'S FUCKING BREAKING ME! I just don't really know.