Now, being ill, he still has no consideration for your health. Does not communicate with you but tells the nursing staff and hospital staff exactly what is wrong but I have to guess. Just mean spirited. He has Parkinsons, dementia and incontinence. I know he must be miserable but I am all he has. His 2 adult daughters are living their lives.
I chose to keep limited contact with my mother even though I was all she had too. In reality, she "had" all the staff she'd sucked up to all those years and so does your husband. Dementia or not, if they know enough to treat only certain people badly, they know what they're doing. Period. Save yourself from the toxic fumes your husband emanates. He doesn't want to communicate with you, fine. You don't have to knock yourself out trying to. Limit your contact with him and save YOURSELF now because YOUR health matters too.
Best of luck to you.
Are you currently his PoA? If not, is anyone? Are his daughters? Is he in a facility permanently?
I would hand the care and management reins over to his daughters and let them know you will be on hiatus to take care of your health issues. Others on this forum have divorced spouses such as yours for a variety of reasons: to get out from under the caregiving burden, as an asset preservation strategy, etc. You may want to consult a certified elder law attorney before making any decision.
So sorry for how this is turning out. You MUST take care of yourself as a priority.
OR...perhaps he doesn't recognize you as his "mate" any more and feels more comfortable sharing things with those that he sees 24/7.
There's no trying to figure out someone with a broken brain, so quit trying.
Instead just continue to be there for him if you want to, but I would probably limit how often you visit and for how long, as you and your mental health matter in this equation too.