It is not only in misfortune that friends are desirable, for the happy man needs friends with whom to share his happiness.
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“The good man should love himself, but nobly (1169a) . Friends are a comfort in misfortune, but one should not make them unhappy by seeking their sympathy, as is done by women and womanish men (1171b) . It is not only in misfortune that friends are desirable, for the happy man needs friends with whom to share his happiness. “No one would choose the whole world on condition of being alone, since man is a political creature and one whose nature is to live with others” (1169b) . All that is said about friendship is sensible, but there is not a word that rises above common sense.” source