im 5'1 and in the 8th grade.im 120 pounds and have a small frame so i look fat even though my friend that is a couple inches taller then me looks really good and skinny. we weighed are selfs and i sawl with my own eyes that we weighed the same. Trust me your not fat and its normal for a person to change their weight through out the year. just give up soda and a lot of suger and dont eat after 6:00pm and you'll be perfect i trying to lose about 10 pounds