Sorry - only just saw your response I'm not sure if you have seen him yet but I think he would see it to your credit that you were telling him about it. Nothing might have 'happened' that lead you to do it, but there would have been thoughts and ideas that preceded the self harm that should be examined. After all, we don't do everything we 'can' do so there is a reason you decided to do that - even THOUGH you strongly believe in keeping your word.