I agree you need to get some help. speak with family dr. call local
social services in your area and see if they can provide some help.
depending on what insurance you have there might be a service
available also is your husband was a veteran call the local va
hospital.
good luck

You have yo get help in caring for him. This environment is bad for both of you. I have a similar situation so I know how horrible it can get. If you can get help with his care you’ll feel better and can them find ways to get the person to be more active. You can get advice from his doctor who can help you with diet, etc.
Take care of yourself!