I would sit in a corner and cry, seeing as I would have no one to talk to. And besides, if I ceased to exist, it would cause a paradox because then everything I did before then would be gone, and all the decisions I influenced would have no basis, and the space-time continuem would eventually fold in on itself, causing a massive implosion, vaporizing everything in the universe.
Moral of this story? There's a difference between dying and ceasing to exist.