Once again this is Mr Miaou, I really should get my own login!
I am overweight, have been up to as high as 19stone 13lbs!! Which at just under 5'8" is a tad overweight. Some of that was exacerbated by being on heavy doses of steroids for about 18 months, but basically it was down to eating too much, drinking waaaaayyyyyyyyyyy too much, and being idle.
I made all the excuses that you can even imagine. But in the end it is down to one person and one person only if you are fat. Yourself.
As with any other personal problem it is the underlying causes that usually need sorting out. Once they are being dealt with the then it is possible to do something about the symptoms.
In my case - and lots of men - the problem was / is depression. Long term, un treated depression. I drank to hide how I was feeling from myself, and ate for the same reason. I started taking medication for the depression, not as some kind of magic cure, but to give me the crutch I needed to help me start to deal with the causes of depression.
Since doing so I have totally changed my diet, which I had believed was already healthy. However having now cut out anything "fatty" or "sugary" and massively increasing my intake of fruit and veg I have lost 2 stone in 2 months. And that is without evening starting to excercise which is my next big challenge. (To be honest I was too fat to safely do any excercise.) Now however I am about to embark on a campaign of walking - it only needs to be 20 minutes per day to start with. Obviously it is good to increase that as fitness improves. My long term goal is to get back to the standard of squash that I used to play (I played for the Army and for Yorkshire third team).
I guess what I am trying to say is that the only way that your dh is going to lose weight is IF he wants to. And to get him to that state may take a lot of hard patient work. Try and identify why he dislikes himself.
Is work fulfilling - or does he hate it? Is he depressed? Is he suffering from stress? Find the problems and help to overcome them. Give him permission to do what he needs to do to get a grip on his life and the problems he is having. Then look at diet and excercise.
But in terms of diet if he really wants to stuff his face make it fruit and veg. Not cheese and nuts. He can eat as much fruit and veg as he can stuff into his body, almost without limit. It will fill him up but not increase his calorie intake too much. Regular meals are important too, so if he is in the habit of skipping meals nd then bingeing to make up try and stop that too.
Could he incorporate a 20 minute walk into his everyday life? Does he drive to work? Could he walk? etc etc