Bite Me! by Melissa Francis

"AJ Ashe isn't your typical seventeen-year-old vampire—as if there is such a thing! She's stuck in the middle of a huge fight between her two BFFs. Her ex-boyfriend—whom she's still totally in love with, by the way—is now her stepbrother. A former classmate—who, um, she may or may not have turned into a vampire—is stalking her. And now, apparently, the fate of humankind lies in her little undead hands. What ever happened to the good old days, when all a vampire girl had to worry about was the occasional zit and hiding her taste for blood?" (from Amazon.com)

Paperback Info: ISBN 0061430986, HarperTeen, July 2009