so with facebook, you have two choices:
you can add the other person, which will make him think you're friendly and/or want to be his friend,
or you can wait for the other person to add you, which gives you an ego boost and the comfort of knowing he likes you
usually i just add the other person because it might actually make a difference in the relationship. and if i'm always the one adding other people, of course they won't add me...which is why it doesn't bother me i guess.
of course you're really in trouble if you add him and he doesn't accept your request.
p.s. i'll friend you on facebook if you send me the link