If you can't stick to a diet then you need to get a training/diet partner to keep yourself accountable. Someone posting a diet on here isn't going to help if you can't stick to it. The other option is to hire a trainer but even then you will need to have some willpower as they aren't going to be there every second of the day stopping you from cheating.
For someone your size you should look into P90X. It doesn't get much credit on here as it isn't aimed at people who are used to exercising and eating a semi-decent diet but for someone new to a workout regime and dieting it has everything you need to get into shape.