You are overweight for the most simple reasons. You are eating the wrong food, in wrong patterns and the wrong types of calories each day.

You will not loose weight by starving yourself. Your metabolisme will adjust itself by burning fewer calories each day.

If you eat 2500 calories each day, your metabolisme will attempt to burn 2500 calories each day. If you eat only 1000 calories each day, your metabolisme will attempt to burn only 1000 calories each day.

That's why you have failed in your past dieting attemts, and why your friends can eat 2500 calories each day without gaining weight.

LOW FAT diets and LOW CARB diets DO NOT WORK... Ridiculous Low carb diets which are popular, are simply just starving diets.

The only way to loose weight is to cheat your metabolisme... It takes a few days for your metabolisme to adjust itself. It is possible to force fat burning to happen by cheating your metabolisme by shifting the types of calories you are eating in a specific pattern. Your metabolisme will adjust itself after what you have eaten the last few days. It will not know what you will eat tomorrow. It assumes you will be eating the same way.

Your menu needs to shift every few days. That's why you have never been able to loose weight.