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You are great at making excuses. I understand how difficult losing weight can be and how it feels difficult to make changes. I have lost 85 lbs since last January going from 6'3" 280 lbs down to 195 lbs by making lifestyle changes (healthier eating with more veggies and fruit, less meats, less carbs, more whole grains, less booze and more exercise). There is nothing in my life that is off limits, but my portions look a lot different. Do I still eat a burger and fries? Sure, but is means that breakfast is yogurt with granola and lunch is a big salad with fish or chicken so that I can eat a burger and fries for dinner. This is a lifestyle change for you, not a diet. Diet's don't work for long term solutions.
I am going to be blunt with you because there have been people providing you great advice, help and encouragement. Are leftovers as good as food that has just been cooked? No, but deal with it there is not always the option to make a "fresh" meal every time we eat. Plus, it's wasteful to not eat leftovers. Also, the whole "any food I make is bland" line is BS. Have you ever had Indian food? Indian food can be very healthy and is very flavorful. Is it to your liking? Maybe not but it has flavor. Have you tried taking some cooking classes or reading some cookbooks? Try The Flavor Bible to learn about what ingredients, spices, flavors and types of cooking techniques go together. Look at some of the Jamie Oliver cookbooks that are designed to be healthier options and put food on the table in a reasonable time. Low carb? That is BS. One serving of pasta is about 210 calories, the carbs in that are fine. It is the fact that people eat 4 servings which is 840 calories (.5 lb of pasta) and also eat 8 oz of pan fried chicken smothered with cheese about 500 calories and bread with butter, another 400 calories, and a glass of wine at 150 calories that is the problem. So, you just ate 1890 calories and carbs are the problem? No, its portion control and the fact that you just ate almost a full days worth of calories in one sitting. Also, make sure you are eating at every meal. If you opt not to have breakfast or lunch or only take in a hundred or so calories your body thinks it is fasting and converts all of the food you eat to fat to prepare for not having a steady supply of food. Also make sure not to eat after 8 o'clock, cut out tea and lemonade, sodas and other calorie laden drinks and just drink water.
In addition, moving, not neccesarily exercise, is key. The fact that you are scared to exercise because you worry you may have a health event is a sign that you need to be moving more. You need to move be it walking, riding a bike or swimming as mentioned. Remaining stationary is brutal to your body. Try to let as many people in your life know that you are making changes to your lifestyle. When a lot of people know about it they will help hold you accountable for moving and eating healthier.
You have a couple of options at this point. Continue down the path you are on and enjoy the time you still have left with your kids and wife. Or, make some difficult decisions, take the initiative to change your life for the better and live a long full life to see your kids graduate college get married and have a family of their own and play with your grandkids. Sure, the changes are difficult and they suck at the beginning but the results are worth it. It all boils down to you making a decision that enough is enough and not making excuses of not having time, liking the taste and all the other excuses that have been thrown out on this post over the last year and a half.
I have kept eating the same foods I was eating but I am reducing portion sizes. I eat minimal amounts of carbs, try to keep meat portions to 4 oz or less and eat lots of veggies, fruits and salads. Exercise will definitely help, you don't have to do it but even just going for a walk will help to start out, especially if you weren't doing any exercising before. Also, make sure to eat breakfast, it kickstarts your metabolism for the day. My breakfast is usually one fried egg or scrambled, 2 slices of bacon and a piece of toast, or a whole wheat english muffin with almond butter, or healthy cereal with fresh fruit.
This is just my $.02 but I think you will have to start eating more veggies (non starchy veggies) and learn to like them, it is one of the more healthy things you can do for yourself in the long run. As other mentioned, cut out most drinks other than water.
I also use the My Fitness Pal app. I found that it really helped me to find out what I was eating and how much of it by putting it in that app and when I looked at what I was eating I was shocked at how much I actually ate. Also, cut out snacks, late night eating and make sure that you are trying to measure portions to what an actual serving size is.
I have lost 30 lbs in 3 months doing that and exercising 3 days a week. I am 6'3" and am down to 245 now and feel much better. When I started working out my wife and I would go for about a 2.5 mile walk. It was easy and only took about 45 mins. Now I am able to run for a little over half of the time and at a brisk walk the other part.
Just try to keep motivated and take small steps and make changes slowly.