Mealybug there will come a day when your care collapses (accident, mh crisis) and then emergency care will be needed for your OH. Better to get social services involved now and find a nursing home for him that you are happy with. You WILL feel guilty and upset but the relief of giving over responsibility for his care will be overwhelming. You can visit him in a nursing home, every day if you want (in normal circumstances), so you won't be deserting him. He will get the care you give plus conversation, entertainment if he can participate, meals to his requirements, but, most important, he will be looked after during the night while you get some sleep. I did this with a relative, caused me much pain, guilt and tears, but I absolutely and honestly think we are both better off now. Give yourself credit for the many years you have nursed him because you have done enough. Be firm with yourself and investigate the way forward, get some advice from your local Carers' Centre, they are staffed by wonderful people.
Sorry to hijack your thread Betty, I think it's easy to hide dementia from carers as the conversation is easy as it's in the present 'What do you want for lunch today?', 'What's the weather like?'. More difficult for you if you're saying 'Gt Uncle Jack died, do you remember him?' Part of the aggression is because no, they have no idea what you're talking about and they know they should. My relative at the care home is like Jekyll and Hyde but fortunately remembers very little.