The Aftermath

Kai ruined everything. Liv is dead, Tyler is missing (and a werewolf), the whole gemini coven is wiped out, and Elena is in an eternal sleep... well, until Bonnie dies of course.
So ... why does Bonnie feel a dull ache somewhere in her heart?
Kai's dead. That's why.
...or is he?
Damon knocked his head off and Bonnie witnessed the blood and gore in person. So why does she have this feeling that he's not? Why does she wake up every morning either screaming from a nightmare about him or smiling from a dream about him? She should hate him. And she does. But when Kai comes out from hiding and presents her with a shocking secret- she realizes that she loves him also.