What Am I Riddles

Question: I can't go left, I can't go right. I am forever stuck in a building over three stories high. What am I?

Question: Rarely touched but often held If you have wit, you'll use me well What am I?

Question: Look at my face, I am somebody. look at my back, i am nobody. What am I?

Question: I open to close but I close to open.
I'm surrounded by water but I'm never soaking.

What am I?

Question: Everyone has me but nobody can lose me.What am I?