How to go fromize 6 to 2 or 0 by the end of summer?

only thing that will work is diet, not anorexia, and exercise. and it takes time, as in months to lose a significant amount of weight. and after you lose it, continued diet and exercise to maintain the weight you want. pick out an exercise regimen that works for you and your schedule, and a diet that you can actually do. then stick to both. the weight will come off naturally without any bad side effects.