YOU ARE NOT A FAILURE.
You tried to hold on, you did. it's ok. So you slipped? So what? You can try again, it doesn't mean that everything is lost. It's like smoking, drinking, drugs...self harm is a habit, a coping mechanism. It is very very bad for you but I don't think any of us are very good at going cold turkey!

I am still proud of you - because you are trying, you are talking about this, you know we are not going to judge you for anything. I wish I could say something non-schmaltzy....

it's such hard work huh? Please be good to yourself, you deserve only the best right now ok?