I've been there myself. The hardest part about losing a lot of weight is not the dietary change necessarily but breaking the emotional connection food has for you. I've made great strides in this in the past three or four months by reminding myself each time I feel driven to eat something that I've had my chances to indulge in the past and will have occasional opportunities going forward but that for right now I have to make the right decision. Focusing on being perfect one meal/snack at a time is how you have to start...Then as you become more consistent in your good decisions and you starting seeing results you have more and more to motivate yourself with. Hopefully this helps! I know it's definitely helped me.