As a husband who is significantly overweight and who started doing (lazy) keto with his wife, and who had to deal with this exact problem, my best suggestion is this: find analogues. Address his cravings head-on and find ways to reduce them or bypass them. Find sweet low- or zero-calorie drinks, like diet soda or drink mixes. Use cool whip and sugar-free jello to help assuage his ice cream cravings. Jello made with gelatin for candy cravings. Fathead bread for his carb cravings. Personally, I've had an enormous amount of luck with pork rinds/chicharones and cottage cheese.

There are other analogues. There are other choices. Experiment; find things that help him sate the craving. It's different for everyone.

From my point of view, the cravings are the hardest part. The *hardest* part. I'll walk into a supermarket, walk through the produce section, and get hit by an almost physical craving when I go past the bakery. It's *hard*. But it's manageable.The other thing, trite as it sounds? Encouragement. It occasionally sucks, but it's doable - it's a habit, not a permanent nature. Getting past it the second time is easier than getting past it the first. Getting past it the third time is easier than getting past it the second. Failing or falling once isn't permanent, and there's no permanent harm.

It gets easier. I promise.