You and me, both!
Especially with certain people. There are people that I think can look directly to the core of my being and see things I don't want them to see. That just scares the living daylights out of me. There are things that I just don't want people to know about me.
It's very difficult when you think someone can just look at you, and tell what you're thinking or feeling, or they can look at you, and tell something about you.
Umm, no thanks...I steer clear of those types of people. In fact, I run very fast in the opposite direction! 
I hate feeling like I'm :Owned: .