Weight for a 5'6 14 year old girl

Hey guys im 14 and i weigh about 144. i was just wondering if that is normal for people my age becuase all of my friends are stick skinny and im not really that!! I play a lot of sports though i do year long swimming and i play basketball. My mom is making me diet but she is doing nothing but starving me. One is this normal weight for me do you think and two do guys have any idea how to loose weight without starving!!!?????!!!!!! Haha 

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Thx love you guys