I have a similar thing going on. My oldest daughter just took off 5-20-20. She didn’t say bye or anything. She just left. She hasn’t wanted any communication with me at all. I honestly have no idea why she became so angry. When she talks to other people she refers to me by my first name. The only thing that was going on before she just up and left was I told her she was not going to stay up until 4 am any longer locked in the bathroom and she needed to get sleep at a decent time and find a job or go to school and get educated. Guess that made her mad at me.