Hi Georgette,
I read your post and 6 months ago i was at my wits' end. I came home from work at 7pm and martin hadn't moved from bed or taken his medecine, or eaten. He was depressed too and quiet (quiet is bad for Martin, he is never quiet). So I nagged and nagged and bribed and cajoled... and eventually he got better. I think the better weather helped as well, the garden looks prettier and it's warmer.
you just need to keep strong and make sure he takes his meds and be there, but also make sure you have you time. Go for a coffee with a friend, vent out and make sure you get quiet time. I used to get the long "oh no not home again sigh" every time I got to the front door after work. It gets better, just stay stron.
This site helps, i had my rant here too.
Take care
Cecilia