I like FB pretty much only to keep up with what my family and old friends are doing -- I almost never post myself except to comment on someone else's update. I'm shy too, like you, and don't feel I have a very exciting life! I'm ok with that, though. I just like to see what my loved ones are up to and comment now and again, I don't sweat the rest.
It's ok to hate Facebook -- it's definitely not for everybody and I don't think there is anything at all wrong with not having a FB page!