One more thing about being shy and then I'll drop the subject:
I've heard "introvert" defined as someone who draws her energy from within, as opposed to an extrovert's need to gather energy from others.
If that's true, I think I've got something to be proud of here. I could maintain my sanity indefinitely on a desert island. No volleyballs needed.
Introvert: a self-sustaining social organism. Take that, party animals.