How long will I last?

Seeing the darkness
I want to be warm
Seeing your face
I want to be alone

Knowing you are there
About to enter my room
I shiver from fear
But I still open my door

I stare at you hopelessly
I realized I am trapped and unable to see
I get weaker everytime you bite
Sucking my blood as a late night snack

I sink back into my bed
After you have fed
I listen to my weak heart beat
I get cold wishing for heat

I open my eyes the next day
But I am still sore I stay still and lay
My mom enters my room
She seems to think I am sick

More than she will ever know I think to myself
I see myself in the mirror
All I see is pale and dark
I look at my neck and at the mark

I shiver as I touch it
It burns at the touch
How long will he bite me?
How long will I last?