I have to be a little creative as well with my family. I have a picky 15 year old daughter (who should know better, but looking at my food habits over the last 15 years...I sure didn't teach her well) and a SO that is 6' and 165lbs! He needs a minimum of 2500 calories a day so...
Favorite Dinners are:
BBQ Steak or Chicken (he eats 8-10oz to my 3-4oz) and baked potatoes (I always have sweet pots or yams to their white pots) and lots of veggies (luckily they both eat their veggies no problem)
Spagetti w/ meatsauce - I only have about 2oz of noodles (before cooking) and they have more. I also make salad and cheese toast (my toast is 1/2 whole wheat bun w/ a couple of sprays of ICBINB, some garlic powder and 1oz grated lowfat cheese) and theirs is heaped with the same cheese with margarine and garlic.
Broiled Chicken/Steak - again their portions are much bigger with rice (I eat brown, they eat white - they just won't go with the brown) and roasted veggies
See the meals are fairly easy...but a lot of it is about portions and such. I do take the low-fat cheese out of its packaging as soon as I get home and put it into a ziplock bag (I tell them it stays fresher) and when I visit the deli counter I get the non-fat turkey and ham instead of regular. I do buy low fat and full fat products (sour cream, yogurt, salad dressing) so that they don't have to eat the low fat (although my daughter will, but SO actually needs the fat/calories). I hide a lot of foods too. I'll steam and then puree all kinds of veggies and put them in sauces, casseroles and so on. They don't know they're there, but then they get double servings! LOL That's a good trick for your little one.
I do think it's important to talk to your SO and let him know that through this journey not only will you lose the weight you don't like carrying but you'll be healthier and just feel better about yourself in general. My SO loves me no matter my weight...but he also knows that there are some very big advantages to my feeling better about my body...specially in the bedroom...if ya get what I mean...LOL
In all of my training for behaviour modification...positive reinforcement is the best tool! If there is something in it for him that he likes...you'll be amazed at how easily he may bend to your will. Haha! I have a friend that flashed her BF every time he brought her flowers or something...it was amazing. He was always bringing home some wonderful little trinket or a single extravagant chocolate...or whatever. Now don't get me wrong...I'm not saying you need to do that, but find something that he loves, something that drives him and use that as a reward for just making some healthier choices. Maybe it's a big slice of chocolate cake or a neck massage or whatever turns his crank.