One possible version：

Dear Ralph，

I’m a middle school student. I’m writing to tell you my problem which has troubled me for a long time. It is the relationship between my mother and me. My mother is a university professor, who works very hard. She is strict with me, but she is so busy with her work that she finds little time to talk to me. I love her and I do well in my studies, but I still feel a little afraid of her because she loses her temper easily. I don’t know how to communicate with her. Maybe it’s because we have seldom sat down and exchanged our feelings and thoughts . I hope we can know more about each other and understood each other better. I do hope we’ll be closer. What can I do?

Looking forward to your reply.

Best wishes!

Yours sincerely,

Li Xiaohua