Who Am I?

Trying to figure out who I am.

With the people I know,
crazy and obnoxious.
People I don't know,
shy and scared.
Who am I?
I seem to change.
I don't know why.
In this case,
I want to cry.
My head rests on my pillow,
seeming so calm and tired,
thoughtless and blank.
But really, it's not that
at all!
My head rests on my pillow,
crazy and awake.
Thoughts and filled.
Who am I?
I seem to change,
everyone doesn't notice,
but me!!
Who am I??

Author's Note

Just thought of it a couple days ago.
I'm change...literally. :X