i struggled with this. My brother went through psychosis. When he was in the hospital I felt it best not to challenge his dellusions; however when he got out and still had them, I didnt know what to do! Honestly, I would be honest with him. For instance, when he said that there was a radio station totally devoted to him, I would say, actually I've never heard that station. I wasnt extremely confrontive, but I wouldn't lie and say I thought those things too if he asked. I'm not sure what the best thing to do besides getting you both help because it is difficult both coping with psychosis yourself and being a friend or family member of someone who is.