Am I shallow?

Is it wrong of me to not be attracted to someone because of their weight? I know this amazing guy and I know he has feelings for me but for some reason I can’t seem to make the feelings past the friend stage and I know it’s because he’s overweight. He’s 300 pounds and I just don’t find that attractive. I’m not saying he has to be like muscled everywhere but idk I guess if someone doesn’t care enough about their health then how can they care about me ? And then there’s this other guy and he treats me great! And I like him but the thing is, he can be the biggest asshole to others. And sometimes he just says things that are just dick things and he expects that saying sorry will change anything. And his attitude and personality is just gross at times. NEVER toward me but toward other people and it just turns me off... am I a bad person for feeling this way ??