I can't say I have ever been scared to show someone what I have written, but I will say that before I first played my bass before an audience I was terrified. High school, "jazz" band (read: band that plays behind the glee club, not actual jazz) and I was in a white suit with slippery dress shoes on a polished wood floor. I hated suits, sippery shoes, playing bad adult contemporary songs that you could hook a chior up to. Not to mention all my friends, enemies and disinterested girls would be watching us up there. The whole school. Hoo. Ray. I had always fantasized about playing in front of the school, but in my dreams it was to the tunes I liked, not Mannilow and John Denver!
I will tell you how I handled it. It may not work for you, but it did for me.
I figured two things:
1) Everybody already knew I was a doofus. So what if now I was going to be a glee club doofus? Like there are degrees of doofishness? Nah. They all thoughti was lame anyway, so why not just enjoy the ride?
2) I didn't see them up there learning their chops in front of the whole student body. At least I was doing something.
From that moment on I have never really had a problem with people criticizing me or my "art". Any artist with a soul will tell you that it takes something special to create, to imagine and dream and realise. ANd if it takes something special to do it at all, it takes some kind of guts to then give it to other people. Because that is you, on those pages (or that CD) and it might just kill you if someone finds fault in it. And they will. But rarely can they offer anything like it in turn. And you both know it. Your art can improve with time. Their criticisms stay pretty much the same forever. And in the end your art might just bring someone joy. What will their criticisms ever bring anyone?
Lastly, art is only complete when someone else experiences it with their own mind. You will never get the whole package until you lay it out there. It's not vain, and it's not ego. In fact, vanity and ego is what keeps us from sharing our work. No one can scoff at what they never see, so it can stay perfect forever... To share the work is the breath of creativity. You inhale the world, you exhale the work. And that keeps your soul alive.
Now get out there and let people see your stuff. Your face is turning blue.