I want to lose weight so bad! Help?

Okay. I am 13 almost 14 years old. Im about 5'4. This might be a shocker but im 180 pounds. I do not look like it but i am. I wear a 12 in jeans and people always call me names like shamoo and fatt *** and it really hurts. I eat pretty healthy. I play lacrosse at the moment and i am a d wing so i run the whole entire field. We do a lot of running at practice. I just finished a weight training program i did before school. I am pretty musucual..i squat 195 and bench 115. I do not get why i weigh so much. Last year i didn't do really any sports because i had achilles tendonitis and plantar faciitas. That made it difficult to run or even walk. But this year i did cheerleading (which we did a lot of runnign and exercising) and the weight training which we did conditioning fridays and 200 abs every monday and wednesday and now lacrosse. Why am i not loosing weight?