The Vampire's Boy by Theda Black

Levi is a vampire, villain and tragedy, a monster made rather than born. He was only a teen when another vampire went rogue and turned him. He's obsessed with his first victim, Jared, who survived the attack. Jared is in love with his best friend, Jordan, and has been for years. Jordan feels the same—but it's too late. Jared pushes him away, believing Jordan's in danger. Jordan is crushed until he discovers Jared's hiding something from him. Something that’s killing him. And in the meantime, Levi's growing stronger every day, drawing Jared in against his will.