A fellow vocalist!
I can tell you one thing... The more you do it, the better it gets. Don't think about it, just do it - that worked for me. I was really scared to sing infront of anybody 'cos there's always that thing "what if they laugh at me or think i'm stupid" etc. The thing is hun, not alotta people can sing. I mean everyone can sing duh, but few people know how to SING. You've got one of the greatest talents ever and you gotta let it grow 'cos it can only get better. I know its hard, but singing in the shower isn't exactly gonna give it the air it needs.

I'm going to an opera school in germany next year, and I can't get stagefright when I stand infront of people who really know their shit 'cos then I'm never gonna get anywhere. If you want to do something with your pipes you gotta learn how to entertain, and its not that hard once you get the hang of it.

So start small then go bigger. Singing infront of people you've never met before and them coming to you afterwards and telling you you have a great voice, is the best feeling ever. Good luck!