HELP! CAN"T LOOSE WEIGHT! EASY 10 POINTS!?

so i will loose 1-2 lbs during the week but them on the weekend i will gain it all bck in just one day. but idk y because i still eat healthy! and i so sick of being fat i need to loose 50 lbs by june! please help me! Also i exercise for 1 hour to 2 hours a day (im a 13 year old girl,5'4 and 168 lbs) And... show more so i will loose 1-2 lbs during the week but them on the weekend i will gain it all bck in just one day. but idk y because i still eat healthy! and i so sick of being fat i need to loose 50 lbs by june! please help me! Also i exercise for 1 hour to 2 hours a day (im a 13 year old girl,5'4 and 168 lbs) And don't tell me im fat because ik that
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