Girl of Averages - J. A. Hailey - Bog

MAKE YOUR BOYFRIEND READ THIS BOOK!
Mark Walters, of the mansion on the corner of Walters' Drive, is a young man with everything. He has the looks, he has the money, and he has the Lamborghini. But he is also a good guy.
Having beauties for girlfriends, does not make anyone a bad person. Discerning, demanding, selective, and other such words might better define such a person.
So, when he meets a relatively plain young girl, he knows how to behave around her, without making her feel bad about how poorly she compares with the sorts of girls he seeks to have as girlfriends. She is average, although there's nothing really to pinpoint in the body parts. It is just that she is one of the billions of normal girls out on the streets of the world, who have nothing going for or against them on the looks front.
As he's the guy with everything, he has to be careful to not let this girl fall in love with him. So, because he is a decent human being, he micromanages the relationship, in a way to keep her safe from the heartbreak of love.
But togetherness is a complex soup, and love never knocks!