what is starving

You need to understand that undereating will lead to a lot of medical issues that are just as (if not more) serious than the medical issues brought on by being overweight. Malnutrition for one, but that's the obvious one.

I have a friend who has lost over 100 pounds in the last four months for the same reason you present: She just had no appetite. That's clocking at more than double the recommended loss rate if you are severely obese and she is. She's been on many meds, including blood pressure meds for many years. During this loss, she ate healthy things and is not suffering from malnutrition, but because of her undereating and rapid weight loss, her doctors were unable to keep her medicines properly adjusted as the need for medicine to regulate things like her blood pressure were reduced with the weight loss. Her BP dropped dangerously low, her kidneys stopped functioning properly, and she ended up in the hospital with renal failure.

Now I know this is an extreme example, but watching it happen has driven home how VERY important it is to eat your calories, or come very close to them. It really doesn't matter if you don't feel like cooking, or eating does it? You're a grown up, and you have to see to your own health. Luckily you have 100% control over this.

Plan your meals. EAT your meals. Log your meals. It's very simple. If you genuinely can't stomach a lot of food for whatever reason, then you need to change the type of foods to more calorie-dense options. @tinkerbellang83 has some great advice, meal prep takes a little time commitment, but then you can spend a couple of hours prepping and freezing enough food to provide weeks worth of single serving healthy meals. If you can only manage one or two meals a day then pack them with full fat dairy, nuts, avocado, peanut butter, cook with olive oil, or how about some chocolate? There are far too many calorie-dense and healthy foods out there to be perplexed about how to get enough calories each day. God knows I spend a lot of time figuring out how to not eat too many of them The point is, there's no good excuse for not feeding yourself.

If you think your appetite is low because you may be developing an eating disorder or dropping into depression, I encourage you to seek professional help now rather than later.

As for the gym and working out, that's secondary to your nutritional health. If you're not eating enough, your body can't afford for you to go to the gym - it doesn't have the fuel it needs for you to add additional movement. Get your food in order, then worry about exercise. Anyway that's my 2 cents. Good luck to you!