假设你叫Liu Yan，初中三年，你与同学们在一起学习、参加各种活动，相互帮助，彼此之间建立了深厚的友谊.校园网的英语论坛开辟了 “Thank you letter” 专栏.请按下面的要求给你的同学Ling Feng写一封感谢信.注意：1.这封信要表达你对Ling Feng的感谢;2.信中要简述感谢Ling Feng的原因，适当举例，并谈谈自己的感受。
提示词语：thank you, at the end of , kind, forget, help… with, stay in touch
Dear Ling Feng,
I would like to thank you at the end of our middle school education. You have been very kind and helpful since we knew each other.
You have given me so much help that I will never forget. Last term, I caught a bad cold and had to stay at home for a week. When I was worrying about the lessons, you came to my home after school and helped me with every subject. With your help, I didn't fall behind others. Since then, we have become very close friends. I think I'll try to help others just like you.
Thank you again. Even though we may go to different schools, I'll always stay in touch with you. I wish you success for the future.