Are You Stage Frightened?

Today, I want to talk about Stage Fright. I'm stage frightened all the time when I have a concert, even I imagine terribly before the concert. It's like what if I ruin my solo awfully during the concert? then I start to be nervous. I try not to think about that kind of night mare , but it keeps chasing me whenever I have a concert no matter what the concert is big or small. I keep thinking about destroying the music. Somebody said that it's because I don't have any confidence. That's right, they're right, then, how can I have the confidence? Does it solve everything about fear? While I'm looking for the solution I found very useful site for stage fright.
Tonight, I finally finished the half of the concert which I have to perform in this semester successfully, even though I still have stage fright, I'm sure it's getting better little by little. You know why? Because there are lots of useful and helpful information in the internet.