What an inspirational storey! - no more moaning about my knee twinges. I think that the way you handled the lack of consequences to someone who profoundly affected your life is also inspirational. Even if the girl had been sentenced to jail time, you'd still be in the same situation physically. Like many mental hits; revenge, grief, disappointment etc, if you can accept that your behaviour is not going to change the physical and practical situation you are a strong person.
I appreciate that it's easier said than done.