It's such a bizarre faux-personal world. Here are some uniquely alienating things about facebook:
1) Everyone seems like they're about to be having a fascinating conversation, but they aren't. People post cool stuff they've found, and they "like" it, and then. . . maybe a pithy comment or two. And that's all. But if you're on when your friends are on, there's a steady stream of new somethings in your news stream--a constant promise that real conversation might break out. It's perpetual, promising, dissatisfaction.
2) Facebook is full of people who I find interesting, but have trouble actually connecting with at all. Facebook will keep us nominally in touch for longer and longer periods of time, but doesn't change the fact that I've no idea how to make it anything more than stupid, expectant button clicks. Imagine a parakeet throwing itself against a glass wall over and over again.
3) I get caught up in the hypnotic stream of other people's "actions," which they probably don't get any more satisfaction out of than I do. Clicking buttons--joining the right groups, "liking" the right things--feels like getting something done. Except it doesn't accomplish anything. . . so you keep observing everyone else's faux-productivity (and a little of their real productivity) and feeling worse and worse about the fact that you aren't accomplishing anything while watching them, no matter how you click.
This is why I musn't spend more than about five minutes there on any given day. If someone wants to talk to me they can send me a God-damned email. That place is distracting.