Why do women reject me?

I like going after all the hotties who look like they go to the gym or could be a model. Those are the ones I am attracted to. Why do they reject me. I am a nice guy. I love to eat McDonalds, Bugerking, Taco Bell, Checkers, you name it. I LOVE DUNKIN DONUTS! I'm 5'5 250 lbs and have spiked hair. I offered a girl one of my donuts before and she said to me, "Get lost fatso!!!" That really hurt my feelings. I try to run a half a mile each day but it gets tiring. Why are they all mean to me?