Would they be willing to go with you to a therapy/psychiatric session? Even your family doctor? My father didn't seem to get it until my psychiatrist directed him to a family information/support group. He went very reluctantly but not only did it mean the world to me, he gained some insight into my health.

I wonder when I hear these stories if the refusal to accept or attempt to understand a mental illness may be a reflection of a person's own fears. Perhaps they worry that they might be found in some way at fault? Maybe they are frightened their own life will suddenly change from what they know? Could it be they are concerned they must suddenly be responsible for our behaviour and actions? And what if they are worried about the foundation of the relationship changing? Additionally, might they now question the relationship is even based on a lie? I think those struggling to accept are also in need of support.