Why didn't Voldemort die and why we shouldn't like Snape?

[Julia]

No: HPFGUIDX 125300


I was wondering about this two questions for a long time. Both of 
them were sggested by JKR so I think they are rather important. She 
said something like: You should be wondering what he [Voldie] did to 
make sure that he did not die. And earlier I've read something about 
ahy many of us are so fond of Snape. She said that we shouldn't be 
because there are some really nasty things about him yet to come.

Yesterday I read a short article on Harry Potter Facts and it gave 
me something to think about. What if it was Snape who helped 
Voldemort to brew a potion that will stop death? We are constantly 
reminded about the fact that Snape is really good at potions... so 
maybe this is it? This is the key to the riddle? :P

IMO it could be rather good reason for not liking Snape - he was 
really evil and that would indicate that Snape was rather close to 
Voldie - maybe even he treated him better than others DEs?

Sorry, if this was earlier discussed here.

Julia, 
who won't stop liking Snape even if he was the one who helped Voldie 
live...