You put yourself on a diet. No one else forced you to do it, so you can stop anytime you want to. It's so easy to quit when there are no consequences for doing so. But if you want to reach your health goals with a diet, you have to be a little harder on yourself. You need to get back on your diet, stay on your diet, and stop cheating. It's easier said than done, but here are some suggestions from connectedcongress.org on how you can do it. Follow them all the way to diet success.
Know Why You Quit
There's a reason why you fell off your diet, and you need to identify it if you hope to succeed this time around. Were you being too restrictive of yourself? Were your goals too unrealistic? Did you cave too easily to temptation? Did you lack support? Be honest with yourself about why you quit, even if you're embarrassed by the reason. It's the only way you'll be able to stick with your diet in the future.