You are doing the right thing by understanding, listening, being available says Philippa Perry
My friend has been unwell for a year. She is convinced her neighbours are trying to damage her property and trying to get all the locals against her. She installed CCTV cameras, then became agoraphobic
My approach was to say the neighbours are not nice and she needs to find a place where she feels safe and to sort out her mental health as it has been affected by the bad relationship with her neighbours, a divorce and lockdown. When you are phobic about something, you know you are being neurotic, but with paranoid delusions you are in a more serious psychotic state. Both conditions make you less able to connect with others, but a psychosis makes you difficult to reach as well, because your subjective experience differs so wildly from everyone else’s.