Rummage through your friends list and see if they're still on there.
When someone adds you as a friend on Facebook, you have the option of accepting their friend request. When you send out a friend request, you are notified by Facebook if that request has been accepted.
Yes
because they give you a request to be there friend
Look through someone that is friends with them, they might have a picture with them tagged in it.
Look on Facebook for people you know who are or who might be his friends - they will probably have him as their friend on their Facebook pages. You can examine all their friend pictures and the chances are good that he'll be there. If he's chosen a weird picture, as some people do, you'll not find him.
You will receive notifications on Facebook if someone is talking about you.
Facebook has not introduced this service yet.
Facebook: you can type in their name and if they have a facebook account you can add them as a friend and keep in touch.
just call him and ask wheather ha has a facebook or not. . . .simple
if you know your friends myspace/facebook/AIM, you can easily ask them or ask someone who is closer to your friend then you are.
sorry but i really don't think that's possible..
Under notifications