Most people who set out to lose weight aren't giving it their first go. They're headed back to weight loss after either giving up on their efforts or having success that didn't last. So I invite you to take a deep breath and pause before you restart. Let's consider a few things that likely didn't work for you.
1. Deprivation- having "cheat days" and "good days" creates a mindset of deprivation that will increase cravings. If you've previously struggled with binging and severe restriction the deprivation approach will likely only work temporarily if it works at all.
2. Treating the symptom and ignoring the root cause- The symptom is being overweight and you're treating that by losing weight instead of focusing on the behaviors and reasons behind the unhealthy weight. Some people have an unhealthy relationship with food that turns it into their coping mechanism to control stressful situations causing over eating and weight gain. Others have physical issues that cause weight gain. Either way- starting a diet program that doesn't address these root causes will only treat the symptom. Until you treat the cause, the symptom will always exist but could be controlled temporarily by dieting efforts.
3. Doing it alone- Weight loss and healthy habit formation aren't easy. Doing these things alone makes it even harder. Even if someone in your household is trying to make the same changes it can get hard. Having someone outside of your household like a support person or group that can offer up support when it gets hard and give suggestions for how to overcome some obstacles can exponentially increase your odds of long-term success.