I feel sorry for you as he needs to understand your feelings. May I ask, are you suffereing money problems and also does he get much time off work, ie does he gets the weekends off etc. Maybe you both need to get away for a while, maybe go away for the weekend, you don't need to travel far, just so he can get his mind off work and his other troubles. It also sounds like you both are in a rut, ie I mean that you both just go through the motions and not enjoying life. Is he also having difficulties at work? if so this will affect his home life as well.
Another way to approach what is on your mind is ask him first what was work like and what may be on his mind. By being upfront with your problems first may be putting him off as really last thing a bloke needs when he gets home from work is a nagging wife.
Good luck and keep us posted.