This is terrible and that's where you decide what to do with it, and they are convinced that they do not need help. Here's the detail.
The most sensible thing is to put distance, especially if this happens in couple relationships. It is a very difficult disorder. Do you live it? Does someone come to mind from your environment?
I haven't experienced it, but it's such a common problem that most of the time we don't see it.
Thank you for commenting.
Always a pleasure