Who is Heath Luck from Betrayed: A House of Night Novel and what is their importance?

Heath Luck is the human ex-boyfriend of Zoey. He attends Union High School and plays on the football team. One night, he tries to break Zoey out of the House of Night and Zoey saves his life from being attacked by ghost vampyres. The same night, Zoey laps Heat's blood and they become linked as a human and vampyre. Zoey drinks Heath's blood on another occasion. By the end of the novel. Zoey saves her life again.