Please, if your going to write self harm into a book, do it properly. Don't just write 'I cut' or 'I want to die' because this can really upset people who have been and are going through such situations. It downgrades it, making it seem so simple and easy when it is one of the hardest things for a human being to have to cope with. Disclaimer that you don't encourage such actions, tell your readers they can talk to you. If your going to write self harm in do it with the needed seriousity and complex detail or just don't do it at all. Sorry to nag.
Always keep fighting,
-Jodie