Voldemort did kill Snape, I know. But it was right when he was realizing that he might want to be good. Snape was never a true Death Eater, he was just misunderstood and angry at everyone for Lily's death. He really actually died for her.
Alan Rickman aka Professor Snape from the Harry Potter movies! Professor Snape is my favorite character in the series and Alan Rickman was the perfect actor to play him! I absolutely positively love this quote from him!