I weigh the same as you do. and someone told me how to lose 54 pounds in 15-18 weeks i depends how you body sistem is you may lose a leat 30 pounds befour school starts. the only way you can do this is you have to cut down on your food exersie for about 30 min. a day do not eat junk food and do a least 30-45 crunches or sit-ups a day any questions e-mail me at boycrazy_200520062003@yahoo.com bye