Answer:
I twist and turn and leaves a loop
I can be written, I can be spoken, I can be exposed, I can be broken. What am I?
What word begins and ends with an E, but only has one letter?
I turn everything around but I cannot move. When you see me you see you!
The more you look at me The less you see.
I'm the source of all emotion but I'm caged in a white prison.