How can he do this to me? i just want to die?

I honestly think you should just move on. If he cheated throughout your full relationship, he's not worth all this. I know it's easier said than done to just move on and forget about him but when you look back on this, you'll think how silly it was to even be upset over someone like him. Give yourself some time to get over it and then throw yourself back out there, find someone new. You're a pretty girl, you're bound to find someone. Just take a break from dating, and forget about him.