I feel the same way. They have comments on all their updates, huge friends lists, I see others doing things with their life when I'm stuck right now, and they get people randomly commenting on their wall. I see people who've randomly removed me (granted I've changed my name so it may be accidental I suppose) or people who know me but don't add me (again, may be due to the name change). I GREATLY dislike that comments I make to others can be seen by friends - I don't understand Facebook's lack of privacy/hit-or-miss privacy.
I do wonder how many people read my updates, and it also bothers me there are no photo's of me; everyone else has hundreds of photo's of them having fun - I don't 'get' fun, those group shots with friends leaning in looking like they're having a good time, I'd never be able to be in such a shot which makes me look anti-social and feel like I'm missing up on life. Asperger's is bad enough, but being unemployed too means even less of a social life so even worse when you see other's having a social life.
Worse still I see photos of a lot of my friends going out without me.
Many of my friends I met through a job I left 5 years ago, people I used to go out with, babysit their kids, go to their weddings, some helped me move and some I considered close friends. They all still work there so they have work nights-out with their new work mates which obviously I can't go to as I no longer work there (even if I was able to go I left due to constructive dismissal so wouldn't want to risk seeing old manager). Most of my friends don't come out with me any more because they can't afford to. Even if they don't go out with each other they can maintain their friendships as they see each other every day, they add more and more people to their group as more people start working there. I see them making comments to each other and I just feel more distant from them because I'm on the outside of the group now, it's almost like they're no longer my friends any more. It's not a nice feeling.
This is the problem with a SOCIAL networking site, for those of us not great socially it makes us feel all the worse for it.
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Bloodheart
Good-looking girls break hearts, and goodhearted girls mend them.