Or where friendship is one of the major themes.
Something like the relationship between Cliff Booth and Rick Dalton, Harry Ron Hermione, the 3 dudes in Husbands by Cassavetes, Mikey and Nicky by Elaine May. (Sorry to use film references, I just really don't know any books about friendship besides Harry Potter off the top of my head lol)
by MorrisBlake01