Trezirea by L. J. Smith

A confident high school queen bee becomes obsessed with an enigmatic new boy who is secretly a centuries-old vampire trying to live quietly among humans. As unexplained attacks rattle their small town, she is drawn into a dangerous love triangle with his dark, vengeful brother and confronts jealous rivals, buried secrets, and supernatural threats. With loyal friends at her side, she discovers that desire and destiny can awaken perilous forces beyond her control.