No wonder you are having a hard time sticking to exante if you keep failing on the first days. You end up having to repeat the hardest part of the whole process over, and over, and over again. I don't think i could do that either (done it several times now myself though). I've now done over a week 100% and i feel sooo much better and the diet got so much easier. If you do start again you really have to keep telling yourself over and over again NOT to break it because this is the hardest part, the feelings of hunger/obsession with wanting to eat WILL end and it is only for the first 4 days or so (first 3 days normally hardest) and that by breaking it you are just prolonging your pain, and since you are overweight it is going to be something you have to go through anyway if you want a fast boost to your loss, so just go for it.
One thing that helped me finally get through the early stages was to become a regular poster on here. Come here and share when you are having a hard time, and write to us before you want to jump in and eat something and we can help distract you.