Snape, Voldemort, and Dumbledore (Vampire?)

[Free Soul]

No: HPFGUIDX 106952

Well we all know that Snape was a death eater at some point, but 
could he have been the one who made all the live forever potions 
for Voldemort to take? If so, is that why Dumbledore keeps him 
around? I still believe Harry will kill Voldemort but maybe Snape 
plays a big part in it in one way or another. Snape does say in 
Sorcerer's Stone that he can even put a stopper to death. 

Or maybe that goes to another theory, is Snape a vampire? Is that 
how he can put a stopper to death? If Snape is a vampire maybe that 
is the reason Voldemort hasn't killed him. Voldemort could have made 
him become one for certain reasons; show loyalty or maybe to use his 
own blood to make Voldemort's live forever potion? I honestly never 
thought once about him being a vampire, but now I have to admit after 
reading some theories such as the Snape always getting called a bat 
and a part I never noticed (which I beat myself up for for not noticing, 
but that's why I have you guys) where Lupin assigns a vampire chapter 
and tells Snape about it and now my theory listed above, I am now 
more than ever driving myself crazy.

"Free Soul"