This one is for you ladies, I started liking a girl because shes really hot !! ......?

But.......once i started to hang out with her i realized that intellect did not match her beauty. I am a science I need some brains or at least some sort of stimulated thought. She wants to know why I liked her and now why I don't what do I say because I don't want to hurt her. Shes a nice girl an all just dont want to hurt her feelings!