What? You too?
Friendship arises out of mere Companionship when two or more of the companions discover they have in common some insight or interest or even taste which the others do not share and which, till that moment, each believed to be his own unique treasure (or burden). The typical expression of opening Friendship would be something like, "What? You too? I thought I was the only one." -C.S. Lewis The Four Loves
Friendship starts with common interests, likes, dislikes, common beliefs, or passion for a common cause, or project. But as time passes, and that friendship deepens, we move beyond common tastes and discover our humanness.
Our friendship and bond become common struggle, pain, joys, doubts, sickness, addiction, and loss. The things every human deals with living with broken bodies and in a broken world.
What? You too?... can be shared between any two people.