Hon there's a difference between being a good wife and a doormat - people do tend to get angry at the world when faced with this as it's scary and no one wants to face heir own mortality - but it sounds to me like he's the one who needs counseling. Going to a counselor isn't a bad thing for yourself either you likely need someone to talk to to put this all in perspective. It's very possibly his medication as well bu it's not fair to you to be poorly treated so don't blame yourself. Hugs!