Dear teacher
I have not see you for a long time.How about you?
Frankly speaing,I am faced with some challenges.First,I have to spend a lot time doing my homework.I have some difficulties in my subjects,so I even give up my favourite hobby.Can you give me some advice? What’more,I think it for granted that I can make a lot friends in senior high school,but I have no good friend.By no means am I a shy boy,why I can not find the friends whom I can share my secrets with?
I hope that I can get your suggestions soon and I will follow them.
Best wishes
（这里加你的中英文名,随便一个）