Im 25 yrs old nd im 82kgs...i don't eat much food...how do i loose weight?

Need nutritionist: You need the help of a nutritionist, coach and trainer -- which can all be the same person if knowledgeable. Your metabolism has likely slowed, since you say you are heavy but eat little. You need a good health evaluation by your physician first. Working with you, the nutritionist can develop a food and exercise plan that you'll like enough to stick with. Good luck to you!