Dear Daming, I know your problem. You¡¯ve made two mistakes. First, you used your classmate¡¯s pen without her permission. Second, when you broke the pen, you didn¡¯t tell her the truth. Yes, you must tell her immediately. If you tell her the truth, perhaps she¡¯ll be angry with you, but at least you¡¯ll prove you are honest. Then I think you should offer to pay. You can use your pocket money to buy a new pen for her. She will realize that you¡¯re truly sorry. I hope the advice can help you. I¡¯m sure you will make up with her soon. Yours, Tom.