Harry is facing a boggart in Snape s class and it turns into his uncle or cousin. Snape makes fun of Harry saying that he can see the resemblance between the two and Harry runs. Harry starts to starve himself because his biggest fear is looking like his cousin. Later, Harry defeats voldemort in the great hall and is mortified that he killed another human being. He takes off for the astronomy tower and everybody is so busy celebrating that they don t notice he is gone. Except for Snape of course. Later again, Harry tries to commit suicide by falling off of the astronomy tower and Sirius and Remus get mad at him and say his parents gave their lives for him and this is how he repays them.