Okay , finally i got it right , okay here is my riddle :
Subject: Enemy
"You Might Not See Me
But I Can Surely See You
How I Look Like
You May Never Have A Clue
If We Ever Meet
It Might Be the End
Even Though
It's Back At The Begging
Where you Began
My Shadow Will Cover You
Anywhere You Go
As Long As
You Never Show
I Can Reappear
Pretty Much Anywhere
But At The Same Time
It's Not Just Anywhere"