Relationships - our lives are full of them! Some warm our hearts and make our lives worth living, while others challenge and stretch us. There are also some that we feel indifference toward. They really don't impact our lives in a deep or lasting way, so we put no effort to deepen them.
Although there are people we just "click" with, for the most part, relationships that we cherish did not develop over night. It took time and effort from both parties to become bosom friends.