Hi Gaily!

It's a shame that your fiance' said such a thoughtless thing, but in all honesty, you're giving him an awful lot of power and control over your emotions and how you feel. You can't control what comes out of other people's mouths, but it's up to you how you respond to it.
Everyone's entitled to feel sorry for themselves from time to time, but don't let someone else's careless comment ruin your holiday for you.
It's easy to feel deprived when you start thinking in terms of what you can't have, how about turning it around and thinking instead of all the things that you can have that everyone who is watching their fat intake would shudder to even get close to their mouths like prime rib, real butter, real cheese, veggies smothered in butter or cheese sauce, bacon, sausage, real salad dressing (not that fake low fat stuff..yuck!) and the list goes on and on.
Yup...I agree it sucks to be overweight and have to not eat certain foods to get that scale to move downward, but it looks like you've made great progress so far and you should be proud of what you've already accomplished.
Go find something in your closet that you like to wear and that you feel looks good on you and have a fun evening.