You are close to some because they talk like you. They think like you. They are loud (or soft) like you. They say the things you want (and like) to listen.
You are not so close to some because they don't seem to..fit into you. They are different. When they say something, you give that look and wonder whether what they are saying makes sense. You show them the face. They don't seem to impress you. No matter how hard they try, they are still your friend but they can never be your close friend.
What is a true friend? Must you need someone who can impress you, to be your true friend? And those who can't impress you remains in that list of friends whom you only talk to when you are...extremely bored..or when the interesting friends are not around you at the moment..
