He's always there

Someone's always watching me
Someone's always there
When I'm sleeping he just waits
And he stares
Someone's always standing in
The darkest corner of my room
He's tall and wears a suit of black
Dressed like the perfect groom
Where are you going?
Why won't you stay?
They might be scared of you
But I just want to play
He has no face
He hides with the trees
He loves little children when they beg and scream

Please...
--
Song: Slendy's lullaby