I know how hard it can be!
Perhaps plan your meals a day in advance with a calorie tracker app like Myfitnesspal. I use that one, and it's really easy. Allow yourself maybe 1,500 calories a day, and try to really use them all.
If your brain likes games (as mine does too), you could even make a game of getting as close as possible to that number!
If you aim for say 300 for breakfast, 400 for lunch, 500 for dinner, that still leaves you 300 spare for a treat.
I know it feels like a short-cut to starve yourself but your body just goes into panic mode when you do that, and it hangs onto every calorie you eat, so you won't lose much at all.
Drink as much water as you can. Fill a litre bottle every morning and aim to have drunk it all by the afternoon.
Eat well but cut out all the junk. If you lose control one day or have a pizza or go to lunch with friends so you're way over your limit, don't think you've blown the whole thing - just be good the next day and you're back on track. As long as you don't do that often, it really won't do much damage.
Also, get out and walk. Get a Fitbit or similar and gradually increase your distances and times. Make a game of that as well.
I've just lost 55 pounds in five months by doing what I've said above - only another 55 to go! I'm hoping to get to my target by February.