Those who get along well with each other naturally gather and become friends. People who share thoughts and tastes come together because they don't have much difference and they can relax. But to have a friend is not supposed to have "another yourself," but to have a person who sees you differently. In reality, longer the relationship gets, the clearer the difference between you and your friend becomes.
"May 2 2019
from “Oriori no Kotoba” by Kiyokazu Washida, The Asahi Shimbun"