This is why you have to find a way of doing it that isn't a diet, it's a new way of life. It took me a long long time to learn that.
I used to always think of myself on a diet. Alright, Monday I'm starting my diet! I'd start, do good for however long. Then I'd have something not on my diet and I'd feel like I blew it. So I'd decide, well I blew it today, I might as well enjoy the rest of the day, then it would turn into the rest of the week and sometimes the rest of the month.
Eating right had to become a way of life, the occasional treat had to become a way of life. A bad day had to just be a thing of the past and not a breakdown that would lead to needing a new start. I'm not perfect and I still mess up, but I'm getting there and deciding to never go on a "diet" again has been a big part of how I've come further on this journey then ever before.
Final Goal: 135 lbs