My wife did exactly that and it was my tipping point. At its baddest point she brought to the front door 12 bags of random items ready to go to her long dead parent’s insisting i take her to the bus stop. It all very normal in dementia apparently and is very distressing for the carer.
I took the precaution of fitting a lock to the door so she couldn’t get out. illegal i’m told but what the hell, i didn’t want her going to the bus stop. The driver will help me she said!
After that i found a home for her as she didn’t want to live with me anymore. I think your tipping point will come when he becomes so aggressive or at least agitated with it that it’s not controllable any more. My wife was doing this at 2 in the morning. She kept saying please help me, you’ve got to help me, you must. No amount of persuasion, reasoning, lies, pleading calmed her down. I put up with all her behaviour but this was too much to cope with.
You cannot continue with someone who doesn’t want to be in the same house as you. Of course, with constructive treatment from the doctor and immediate advice from SS you may find this behaviour lessens and is controllable. I really really hope so for both your sakes.
Get SS / doctor involved and ask their advice. Get support quickly. You cannot carry on like this and I found that no matter how many times you put the bags back the behaviour returns. They’ve seen all this before. They will know what to do and advise you and get things in place. Are you on their radar?
Sorry if i’m being direct but what’s happening to you was the last straw for me and for many people and is heartbreaking when being experienced. I feel for you because i know what you’re going through.
Best wishes, Peter