What should I do?

I don't know what to do. I want to go to a music school for beign a musician, I get people telling me to go for it, but what i'm afraid of is failure. How can I overcome this impending feeling. The reason I don't go for it is because I doubt myself, and doubt my abilities. Is this normal? I think i'm good, people tell me I sound good, I just don't know. Should I just forget about it, and do something else? This is really eating away at me.