Pretty Dead by Francesca Lia Block
Even if I wanted to die for someone, it wouldn't be that easy. They just keep dying for me. Something is happening to Charlotte Emerson. Like the fires that are ravaging the hills of L.A., it consumes her from the inside out. Something to do with the tear in her enviably perfect nails. The way she feels when she's with the brooding, magnetic Jared. The blood rushing once again to her cheeks and throughout her veins. For Charlotte is a vampire, witness to almost a century's worth of death and destruction. But not since she was a human girl has mortality touched her. Until now.