Becoming Too Familiar

I took from you, your own free will, but need you living for me still I need you, loyal; unctuous, to protect me from the killing light ? I control all things; save my thirst, which started with my very first that drink of what I now must have a curse I cannot ever fight My hold on you is even stronger for all of life, or even longer you must ensure I'm always fed and safe when day replaces night I suck the red blood from your neck, enough to keep my thirst in check, to take from you, your spineless life would be a careless act of spite But still, I'd snatch the beating heart straight from your chest without a start should ever you be too familiar, I'll give to you, your one last rite