Suppress your appetite
Look, plenty of people have tried sudden diets with major changes, cutting out parts of their lifestyle in favour of a sudden detox or single food group lifestyle. And all those people got very hungry. And then they gave up.
It's a sad truth, but being hungry is simply one of the easiest ways to lose determination on weight loss. Ideally, you should be shrinking your stomach and suppressing your appetite. Don't return to bad habits, if you're in a hurry just cut down your food intake considerably (but not all the way). When you start feeling hungry choose a sensible amount of food and stick to it. Having shrunk up your stomach should feel full with moderate amounts, where you used to need feasts.