I can recommend the book Anatomy of Friendship [1] by Reisman. It's an old book but dispels the myth that things are more difficult now than in days gone by, since he quotes ancient Greeks/Romans lamenting the difficulties of friendship.
It really made me understand friendship, how to make friends, and how friendship varies throughout our lives. Definitely worth digging up a copy. It's a shame it's no longer in print.
It really made me understand friendship, how to make friends, and how friendship varies throughout our lives. Definitely worth digging up a copy. It's a shame it's no longer in print.
[1] https://books.google.co.uk/books/about/Anatomy_of_Friendship...