What Am I?

Its a riddle in a poem..see if you can figure it out..

Save me from these horrid dreams.
Save me from what rips at the seams.
I close my eyes hard and tight,
Wanting it to go away.
It creeps, It crawls, it does what it wants.
It sneaks behind me,
Giving me a fright.
It walks and talks but mostly taunts.
Its not my dream,
It does not rip at the seam.
Its apart of life,
I cant deny.
It will always be there,
Even when I close one eye.
What am I?