Talking in front of my class

Basically for a few years now I have been worried every time the task comes up of presenting/talking in front of my class. I feel under pressure that everyone is staring at me and this leads to me going red with embarrassment. Furthermore, I also suffer from Anxiety problems where I shake in nervous situations. It's becoming a problem as I enjoy socialising, and don't want to be making excuses to prevent myself from public speaking.