I've namechanged.
DD, aged 15, decided 6 months ago to go and live with her dad. I split from him when she was a baby. Her reason for leaving is because she doesn't like having rules, although DH and I are by no means strict. Her dad lets her do as she pleases. Her dad was abusive to me when we were married.
I am non contact with my parents, as they were abusive too when I as growing up and have been awful to me during adulthood too, undermining me with my children and saying awful things about me.
DD since moving out has refused to have anything to do with DH and I. She will occasionally speak to my 9 year old DD online. I have now found out that she is living between her dad's house and my parents' house! Her dad is fully aware of my parents' behaviour but said the most important thing is that DD is 'happy'.
I don't think that DD is old enough to decide to cut people out and to decide to just drift between two houses.
She has also dragged some of my friends into it. Some of them are her friends' mums and she has dragged them into it, saying things to them that I am meant to have said about them, and causing trouble, as well as bad mouthing me. She also bad mouths me to any of my friends that she sees anywhere. Her friends have all started shouting 'Witch' at me if they see me anywhere.
I am at a loss as to what to do. I feel like everyone thinks I am a bad parent when I am not at all. The stress is making me ill.