Sounds like fun. Don't feel sad or jealous because one of your friends is enjoying themselves. Take the plunge instead. I did a bit of theatre/drama many years ago and the fear is pretty much real for everyone. Its like they say that the number one fear is public speaking. The thing is, once you have done it you realise the fear was internal - all coming from inside - and overcoming it is the best feeling in the world - like a natural high.

Post back once you've gone and let everyone know how you feel then.