I had a good friend when I was 12 years old. We did everything together but I wasn't her only one best friends friend. I couldn't help but think about how jolly she was when she played with another girl. A feeling of jealousy made me upset all day and night.

One day, I came to my older sister's room. Suddenly, I couldn't hold back my tears and it they slide slid down my face. I told her the whole situation and how terrible I felt. She comforted me, although she was astonished by my dramatic expression. She told me that I should be more confident. She also admired me that I was an outgoing person and said that I don't need to worry about my interpersonal relationships. "Most of all," she said, "do not care about what everyone else thinks if that makes you unhappy.''
Time went by.  Now, I am maturer than I was. I can deal with lots of challenges by myself. However, every time when I am frustrated by reality, I always remind myself those words which that my sister had said to comfort me: "don't worry, be happy.''  The thing that encourages me isn't those words she said, but the love she had given to me.