Fear

Someone woke me up, 

Every time I try to sleep. 

Someone follow me behind, 

Every time I go somewhere. 

Someone stares at me, 

Which I can feel every time. 

Someone never leaves me alone, 

Whether I go anywhere. 

Someone is looking for me, 

Whenever I try to hide. 

That someone is not a person, 

It's only fear if I mention...