With all the fancy shmancy things you can do on Facebook to connect to the world and update your friends on current activities in your life, there comes a lot of competition and stress.
"Jackie from highschool has 500 friends and i only have 450. I have to catch up to her before she notices."
"I added John Smith about a week ago and he still hasn't accepted my friend request! Maybe I shouldn't have added him."
"Hey Beth, why did you delete me off of facebook? I know we never talk, but we were in the same grade 2 class. Remember?"
After doing a little research on it, I've come to notice that people aren't using facebook as JUST a social networking site to catch up with friends or give them a quick update on their lives. Facebook has become almost like an online highschool community where everyone is competing to have the most comments on a picture, the most likes on a status, or the most friends. Also, another thing that's contributing to the stress is PRIVACY! Because it's online, any one can have access to it, unless you edit your settings. But then the issue of deciding who should have limited access to your profile arises. You definitely don't want your boss to see those pictures of you at the bar last weekend.
If you do have a facebook account, it's great to connect with people but it's intended to be a fun way to interact with old friends, so don't stress over it.