This could be what Darren Shan may have told his parents and sister when he transformed into a half human, half vampire creature. Because of his transformation, he had to leave his childhood home and fake his death. Now, he is like a slave unto the night since he bet his life to save a friend from dying from a prank he caused so he wouldn't go to jail for murder. The friend, however, doesn't believe him and vows to kill him when he grows up after he wakes up from his coma. Later on in future stories, he returns back to his hometown and maybe he'll ask them to forgive him for every stupid thing he's done.
This could be what Darren Shan may have told his parents and sister when he transformed into a half human, half vampire creature. Because of his transformation, he had to leave his childhood home and fake his death. Now, he is like a slave unto the night since he bet his life to save a friend from dying from a prank he caused so he wouldn't go to jail for murder. The friend, however, doesn't believe him and vows to kill him when he grows up after he wakes up from his coma. Later on in future stories, he returns back to his hometown and maybe he'll ask them to forgive him for every stupid thing he's done.