[kahljorn]

"So why the hell do I feel so wierd?"

These feelings of yours will go away if you sock her in the face. Basically, you probably feel that she's stupid and hate yourself for not seeing what a moron she is. Hence, whenever she gets a belligerent expression you should sock her in her face, because obviously her parents didn't do a good enough job of that. You will feel instantly relieved.
And after you sock her you should draw a silly face on her with a sharpee.