Everlasting

Eliza and Cassandra Reed are vampires, old vampires. They're also half sisters and never really left. Eliza fell in love with Evander Griffin and then was the cause of her loved ones life. A couple hundreds years later in New York, they start high school once more, where Cassandra's old friend, Alastair, turns up, as well as a look-a-like of Evander, and Eliza's real father who just might be the most evil vampire-warlock there ever was.

When the sisters find out what's going on, their mother guarding them in the Other world, a spell that will destroy the most evil being on the earth, and a boy, who not only looks like the boy she once loved, but has started to recover his memories.

Meanwhile, Cassandra and Alastair spend even more time together, researching what's been going on, and Cassandra realises her feelings for this 1000 year old vampire have increased even more, and her heart has a bigger influence on her mind than she had thought before.

Both the girls realise that not only is love everlasting, but so are memories.