根据短文内容及首字母提示，填写所缺单词，使短文意思完整。每空限一词。
I worked in a shop three years ago. A girl started working there a few months after me. I met her often but we never t__. We just saw each o____ and smiled.
She would always smile in a really happy way until one day when we got to work in the same department again. She smiled as if she was the h______ girl in the world. I went up to her and asked, “What’s w______ with you?” She answered, “Why?” I said, “I can feel you’re very sad but you’re always t______ to hide it.” Her mouth just dropped as if I had discovered her deepest s_______, so we started talking. She told me why she was feeling like that and why she was trying to hide it. Time w_____ by and we became good friends. Later she said that I had changed her life in many w____. Today this girl is one of my best friends. She has been there for me in every possible way a friend could be.
I guess what I’m trying to say is that you never know when you’re helping y______. I helped this girl never knowing that at the same time I was helping myself by finding a t______ friend.