Friendship is one of the most overused words in the modern vocabulary. Social media has expanded the label to include people you barely know. The word has been diluted to mean almost nothing while simultaneously being treated as if it means everything. This confusion has practical costs: if you do not know what friendship actually is, you cannot know whether you have it or whether you are investing in the right places to build it. Aristotle, who thought about this more carefully than most, distinguished between three kinds of connection: friendships of utility, where you value the other person for what they can do for you; friendships of pleasure, where you value the other person for how they make you feel; and friendships of character, where you value the other person for who they actually are. The first two are common and impermanent: they last as long as the utility or the pleasure does. The third is rare, more demanding, and the kind that endures. A friendship of character is one in which each person knows and genuinely values the other as they are, not as they are useful, not as they are fun, but as they are. These friendships survive inconvenience, disagreement, change, and distance in ways the other kinds do not, because what holds them together is not circumstance but genuine recognition. They are the ones worth identifying, investing in, and protecting.