When someone tries to add you to her Friend List, two things happen: Facebook sends you an email invitation, and it posts a little notice on your profile telling you that you have a friend request.
At that point, you've got two choices: You can confirm the request or ignore it, either in Facebook or right from your email program.
If you're the type of person who checks her email every hour (or every five minutes) but only logs onto Facebook every couple of days, you'll want to handle friend requests from inside your email program. Here's how:
Look in your email program for a message with the subject "[Somebody] added you as a friend on Facebook".
Open the email message and click the confirmation link. Doing so whisks you to the Facebook page where you can confirm your friendship (see the next section).
Some people log in to Facebook whenever they're in front of a computer. If you're one of them, it's easier to respond to friend requests from your Facebook home page than to fire up your email program and wade through your inbox looking for invitations. To confirm a friend request from inside Facebook:
Surf to your Facebook home page (click the "home" link in the upper-right part of your screen) and click the "friend request" link. Friend requests appear on the upper-right side of your home ...