Nice post. I would be the same...don't want to be there, but I am because it makes some social aspects a little better. And I think FB is very clever at detecting that a lot of people don't want to be on it...but are, just because all of their friends are there. They have all of these algorithms to ensure you only see so many posts from only people of interest.
Whatsapp is a great substitute for groups chats though. I would highly recommend it. It lessens the dependency for FB.