Perfect friendship is only possible between the good, and it is impossible to be friends with many people. One should not be friends with a person of higher station than one’s own, unless he is also of higher virtue, which will justify the respect shown to him.
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“This view, which has been widely held by German philosophers, is not Aristotle’s, except possibly, in some degree, in his conception of justice.
A considerable part of the Ethics is occupied with the discussion of friendship, including all relations that involve affection. Perfect friendship is only possible between the good, and it is impossible to be friends with many people. One should not be friends with a person of higher station than one’s own, unless he is also of higher virtue, which will justify the respect shown to him. We have seen that, in unequal relations, such as those of man and wife or father and son, the superior should be the more loved. It is impossible to be friends with God, because He cannot love us. Aristotle discusses whether a man can be a friend to himself, and decides that this is only possible if he is a good man; wicked men, he asserts, often hate themselves.” source