I'm a 17 year old girl and im 5'2. how much should I weigh? And what is the healthiest way to lose weight

About 120 pounds. About 120 pounds would be a good weight for you. Losing weight requires a combination of reducing intake of food and exercising, easier said than one. You may wish to join a support group like weight watchers. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex. Get HPV vaccine.