A childhood friend keeps reaching out to me, while institutionalized. We grew up together and lost touch years ago after her mental health condition deteriorated and was diagnosed with schizophrenia. 

We actually met up in person in the summer, and it was an uncomfortable hang out. She seemed ok for the first 5 minutes then went into an hour long spiel about how her ex husbands are Shawn Mendes and Justin Bieber, and that we are both dead and living in the spirit realm, etc. 

I didn't entertain any of these delusions, but I did listen. I was mentally exhausted by the end of it and couldn't do it again. She told me she was diagnosed with Schizophrenia, but "knows that's not true because she's done her research". She absolutely refuses to accept it. 

How should I act to her? Even from the mental hospital, she denies having any mental health conditions, and doesn't know why she's there. I'm just not sure how to respond and she keeps asking me to be her substitute decision maker (which I will not do - she has parents who are helping her). 

For those with schizophrenia, what did it take to actually accept your diagnosis? What helpful support did you receive? What were nice things your friends did to help?