Hey... don't be so hard on yourself. Your kid was hurt. And your kid is an addict. Everyone involved did what they naturally do.
I have run after my kid COUNTLESS times. When I accepted her as an addict, I stopped being surprised by her actions. Some of MY actions changed. But if she was hurt, I would still respond. Perhaps she would run... but my recovery had me stop predicting outcomes. That helped me a lot.
(((hugs)))
Prayers that she can find light and recovery soon.