Perhaps instead of saying she's cute, you could say she's amazing, exhilarating, very attractive, seductive, that you're thinking and daydreaming of her all the time ... puppies and kittens are cute, too. Women, however, want to be special to men. Tell her something special about herself, like that her smile is as beautiful as a sunrise over the ocean ... you get the idea.
Never give up on it, just change your approach.
Good luck!