All the Darkness in the World by Andy Deane

High school is hard for many but Jace has more than his fair share of troubles. It's bad enough that his parents' fights have become explosive and he's the target of a bully at school but all that pales when he happens on the scene of a brutal back alley crime. Though he survives this terrifying encounter he's left wondering and unsure about exactly what happened. Years go by and Jace has built a simple life for himself. Finally free of his family he's beginning to really live when a dark shadow returns to torment him. He didn't back down from his father or the bully so he's not going to back down now but it will take every ounce of his irreverent attitude and a healthy dose of luck to survive this time. He's about to learn that vampires do exist and there's nothing romantic about them.