I deleted my facebook account almost a year ago. I loved it when it first came out, but it quickly became unmanageable as I added more friends. I honestly felt too self centered to use it anyways and I disliked how undirected the communication was. When I posted a status update, it wasn't to anyone specifically, just to a group of contacts, making the message much less meaningful, in my opinion. On the opposite end, people posted status updates and uploaded pictures, but they actually weren't directed to me, so I didn't feel it all too important to comment. This is a more exaggerated version of getting an email from an old friend with pictures and a long story of what they have been up to lately, but you are on a list of fifty other people; kind of makes you feel like anything but a close friend. If I want to do that, I write one-on-one emails. Friendship is not about efficiency.
I think it is a natural part of life to lose friends you once had. People grow up and move on. It was nice to reconnect with people from my past, but it made me realize that we aren't friends anymore for a reason; we moved on. I have friends that I have relationships with in real life. That is good enough for me. Some of these friends I will lose in the future, but I will also make new friends. Facebook has only been out for a few years and I already long for the good old days when lasting friendships required hard work.