Oh, I did want to link to this very interesting study

Bullying does more long-term mental health harm than abuse, study says

The long-term effects of being bullied by other kids are worse than being abused by an adult, new research shows.

Among a large group of children in England, those who were bullied were 60% more likely to have mental health problems as adults than were those who suffered physical, emotional or sexual abuse. And among a large group of children in the United States, the risk of mental health problems was nearly four times greater for victims of bullying than for victims of child abuse.

The study itself, published in the journal Lancet Psychiatry, is open access and is freely available on their website (PDF: Lereya ST, Copeland WE, Wolke D. Adult mental health consequences of peer bullying and maltreatment in childhood: two cohorts in two countries. The Lancet Psychiatry. Published online April 28, 2015.)