Keeping a Secret

A few years ago, my friend told me something that I was sworn to secrecy not to tell anyone. A few days after, I was still constantly thinking about the secret. I felt a need to tell someone but I knew I couldn't, because I was putting my friendship at risk. My friend trusted me not to tell anyone, so if I told someone she would be losing my trust. However, after a while she told me this secret wasn't that important anymore so I felt relieved. I was no longer stressing over the secret and my mind was now worry free.