I've been friends with a girl for the majority of my life. She is my longest "friend". Throughout our friendship clear she has been the dominant one. As a child I pandered to her silly requests (gave her my lunch, did whatever she asked, naively thought it was a friendship).
After some counselling it has become clear that this girl has caused me serious psychological damage. I tried to address one horrific incident from our childhood with her that my counsellor helped me heal. She maintained she didn't remember it and laughed it off. (don't want to go into the details on the off chance anyone I know reads this as they'll know who I am).
I can no longer be friends with this girl. But she is a part of my circle of friends. How do I end the friendship but nicely for the sake of the group?
I don't want to talk to her or give her an explanation because she is the type to laugh, and sneer. I basically want to ghost her, but can't because of the bigger group! any advice?