Females do tend to over-react at times
Be strong, try to occupy your time in constructive ways, keep eating even if you don't feel like it or can't taste anything, force yourself to run around the block or any other form of exercise that will get your serotoninpumping. It really isn't the end of the world though it definately can feel like it...don't let it be the end of your world...noone is worth dying for...not even her.