Bite

From Book 1: Ellie lives the life of a typical teenage orphan. The group home she lives isn't that great, and the only person she can trust is Zoey, her best friend and fellow orphan. Their lives change forever one night, when they have a run in with creatures that they once believed were myths.
Ellie meets Azrael, a vampire that has been pining for the woman he loves for hundreds of years. As Ellie and Azrael's relationship develops Ellie experiences abilities she never knew she had. Her abilities shed light on what happened to Azrael's love. The only problem is the truth could destroy both Azrael and Ellie.