Why do you feel like this?

The teacher asked us to write what makes us happy. I sat there, thinking. It had been a few minutes, everyone around me scribbling down their answers. I just sat there, not knowing what to write. I thought about how music always brings me some kind of emotion, maybe it wasn't always happy but I didn't have to say that. I wrote down music, and the stars. Everyone else had down a bunch of answers. I was glad that I at least had two. They all talked about their families. It was hard for me to watch everyone else smile, while I suffer.