For me, Facebook makes me feel like an outsider.
I isolate too, and find myself pathologizing this.
For me, it's part of my personality, and maybe a little bit of depression, too.
I'm not very social, so I find my happiness in seeing things that are beautiful, like from the eyes of an "outsider" if that makes sense.
Not sure if that depression, or just the way I'm wired.
I do crave human connection though...and get a little jealous when I see "normal" people on Facebook