Dear Sally,
How's it going?I'm very glad to hear from you.From your
letter,I know you feel very upset now and you don't know what to do.Well,I have some good ideas that may help.First of all,I think you should write a letter to her,so that you can tell her something about your feelings.Second,why not make more friends in your class?I believe that it's a great way to make yourself feel better.At last,I think you'd better buy something useful for her in order to make her remember you.In a word,if you do like this,I'm sure that you can feel very happy some day.
Best wishes
Edito