You sit your parents down and start with .. I am not going into this with out lots of thought. My uncle is just someone that is not healthy for me and I know you want me to take good care of myself as I am your child. I will be polite with a hello or goodbye to him, and that is it.. if for some reason he doesn’t understand I do not wish to have any more interaction I’m sorry. If I will leave the situation. Please keep in mind I don’t want to leave family gatherings but my mentally well being is some that I can do.

Stand your ground