Составьте пересказ по английскому

I just got your letter and i of course i would happy to help you. A lot of teenagers feel the same way as you and there is nothing.First of all,you shouldn't worry too much about your weight.It will change,because are will grow.It might a good idea for you to start do some exercises and follow healthy diet,be sure you will lose your weight. I hope my advices will help. Let me know,how it goes