The advice about looking after yourself is very wise. I do feel sad for your husband, there must be something that would help - not solve it completely, but to give him a bit more interest in life. I don't know if there are any befriending volunteers or MIND volunteers who could give him one to one support? I realise they wouldn't be as knowledgeable as you or care as much as you, but there is so much baggage with close relationships, it's just sometimes a breath of fresh air to talk to a stranger who just wants to learn how you feel and see if they can help.Probably a daft suggestion, but reading your post you both seem to be doing all the obvious things. Best wishes.
People eating and drinking on the go
Should women have equal pay and opportunities?
To think that London, or anywhere else for that matter, does not belong to any one demographic