"There are persons who cannot make friends. Who are they? Those who cannot be friends. It is not the want of understanding or good nature, of entertaining or useful qualities, that you complain of: on the contrary, they have probably many points of attraction; but they have one that neutralizes all these --they care nothing about you, and are neither the better nor worse for what you think of them. They manifest no joy at your approach; and when you leave them, it is with a feeling that they can do just as well without you. This is not sullenness, nor indifference, nor absence of mind; but they are intent solely on their own thoughts, and you are merely one of the subjects they exercise them upon. They live in society as in a solitude."
- William Hazlitt