All I can say, being over twice your age, is yes, do what you need to do to stay sane BUT with the benefit of hindsight I wish I had when I was younger, is leave the door open. She has some growing up to do and when she does, you may reconnect again. Allow for that to happen. Don't necessarily plan for it, but leave it as a possibility. I personally wish I had a chance to apologise for my behaviour and reconcile with family members before they died. Hugs to you from England.