Harry Potter and the Deathly Hallows

Two years later,the 7th book-Harry Potter and the Deathly Hallows-of the series Harry Potter will come soon.
It's the last one of the whole series,and the battle between Harry and Voldemort will finally come to an end however.I guess Voldemort will be defeated eventually,but whether Harry's alive or not is uncertain.Considering this is a book that many readers of it are children,I prefer Harry could be survive with the help of his friends.
In my opinion Snape's not an betrayer.What he did -killing Dumbledore-is just what Dumbledore told him to do when they in the forest,which is the reason that he quarrelled with Dumbledore .Such deeds will make him get closer to the secret of Voldemort and finally to help Harry to overcome Voldemort.Of course,it'll prove Dumbledore's brilliant once again.
Moreover,dislike Hermione and Ron to be together.