I think this video, which I discovered via the Mind site, describes social anxiety very well. It’s not all that similar to my experience, but it’s typical:
http://www.youtube.com/watch?v=0Dd_VR-Ef20
Having met people who claim to have rid themselves of anxiety but don’t appear to have done, I think this sentence makes a lot of sense:
You never get rid of anxiety completely, but you learn to manage it.