You don't choose your friends, but nor do they choose you. Friendship is born out of a shared fear of lonliness, abandonment or desperation. It may feel nice and cuddly and warm, but that's all an illusion, emotions that you have felt a hundred billion times since the first person in the playground came over to talk to you because they didn't want to spend lunchtime alone.
I'm feeling distinctly lonely. It's at times like these when I launch headfirst into my philosophy, bring on the existentialists! All is full of Nothing.