I remember being terrified of showing people my work. I finally was forced by one of my teachers in high school to share a poem with him because it was an assignment.
He read it and wanted me to publish it. I was taken aback by that statement and said, "It can't be that good." He said, "Kim, something is good when they (the students) don't understand it."
If it wasn't for him, I probably would have never had the strength to publish any of my work. So my advise is to force yourself to do it. You never know what can happen and you just might be surprised by the outcome.