This will sound like a joke almost, but it actually worked for me.
Take a few trips elsewhere. Make sure fiance/husband see how much they "actually" cost as well. Make sure you go somewhere overpriced, with poor service or lots of traffic. lol.
We had a few ill fated trips. Universal with horrible service, trapped on a ride. We spent a fortune for just a weekend in Toronto, got a parking ticket when our car was all of 1 inch over a line, and the weekend cost way more than a weekend at Disney would have. New York was fun, but the cost of food, cabs, the traffic, etc.. didn't necessarily make it relaxing or inexpensive! So many trips we went on while they were great experiences turned out to be still pretty costly when we added up food and entertainment even though the initial flight or hotel costs weren't and there were plenty of stressful aspects with traveling around them, waiting in lines, or poor service.
When we were first married my husband begrudgingly would go to Disney, but as he's compared it to how much less stressful it was to other trips, and how the money was actually comparable when you looked at all the nickel and diming of other trips to cosmopolitan cities (Husband hates camping, so that didn't factor into the picture.), and then he started to notice how simply RELAXED and HAPPY I was there, it became a relaxing happy place for him as well.
I never would have dreamed my disney mocking husband would have agreed to purchase DVC recently, but the more he went the more he realized it's benefits. Having a young child now certainly even added reinforcement.
I will admit I'm the big saver for the trips though and a big planner on how to maximize a buck. Disney Movie Rewards for gift cards, literally rolling change for extra spending cash, squirreling away $1 here, $5 here, watching airlines and hotel deals like a hawk and anything else I can do to give my husband a little less sticker shock. Like others have said, there are ways to do things a lot cheaper than CB during F&W too
Also, when/if you do Disney again really make a point to see what makes him light up and be sure to include plenty of it on your trip. Is it the thrill rides? Is it actually a relaxing spot away from the crowds, a nice dinner out, or a boat ride? See what he finds special at all and focus in on that, reinforce it and maybe he'll come to associate Disney with something that makes him happy too.