Aristotle defines friendship as mutual good will and reciprocated well-wishing.  He also states how there are three types of friendships.  These friendships include friendships of utility, friendships of pleasure, and complete friendships.

Friendships of utility focus on people in the relationship for the sake of an instrumental good.  Those who love for utility only like others for what is good for themselves.  Friendships of pleasure include the enjoyment of being around a person.  Their lives are guided by feelings and pursue what is pleasant for themselves.  Complete friendships are the friendships of good people similar in moral exposition.

I believe that Aristotle’s explanations on the three types of friendships seem sort of broad.  I feel like there could be many more types of friendships among people.  Although there could be many more possibilities, I agree with Aristotle’s claims.