Is this part of the American culture? I'm from Europe and while there is a lot of people sharing every single thing on Facebook here, I would say that most of the people never really post or follow stuff on Facebook. People don't really care that much about the social showoff. Most of people use Facebook because it is really convenient for contacting other people and organizing events, and that's it.
Can't you just use Facebook when you find it convenient and then just move on with your life?