Wow. Imagine if this was your reality, firmly, passionately believing and feeling this?
Read a book called MadDog. Entire premise isvery much like this, told from his perspective. He firmly believes he is a prisoner in a gulag. The book plays it straight as he plots his escape…final pages pan outward from the prison…it is a mental institute. And all of his delusions are just that. Delusions.
You really buy in to the character, the story, etc.
I feel for anyone trapped in their own head.