Hi Griffin.
Im new here ( 1 hour ) but as a 74 year old war veteran Ive been in hospital almost 40 times since 1980 and have seen MANY sufferers of schitzopherenia so I feel qualified to give advice.
Clearly you love him (dearly, desperately? ) and you cannot afford to lose him. IMHO at some time in the future an insufferable event WILL take place and the tragic pain can be horribly life changing.....an so, as a matter of utter urgency, you must 'strike swiftly' to prevent the inevitably pain and as none of your efforts have produced a result stand back and attack his denial in an unconventional way. Im assuming you have a mutually strong love for each other ok?
How about a bit of really convincing acting? To demonstrate the gravity of his situation try producing an apparent break down. Get teary ( convincingly ), do some trempling, eat less, appear to be going into 'break down' mode - terrified of an unravelling existence, life isn't worth living should your fears materialise. If he loves you truly - from the bottom of his heart - hopefully, surely, he'll see things differently - that just maybe your assessment of his behaviour is on the money - 'My God Darling, I'm only asking for a professional assessment and a couple of tablets a day isn't going to hurt you Love'. Get on the stage and prove to him how right you are, that life as we know it is at stake'. Becoming a star just might give him a new perspective, some insight.
What have you got to loose?
Life is starting to unravel a little already so get moving Lady. Take control in an attempt to keep what you have, need and love.
Yes, it's only the opinion of a stranger but surely my way can't hurt and just maybe you'll win a bit of a lottery. Yes, my suggestion truly is a bit of a lie but it can't hurt, can it?Fight for what what you have because further deterioration, really, is unbearable.
Good luck Lady and know that you ain't alone in this.
Brian 🦀