I'm sad for you, in that case. No one should feel like they have to change the core of their being just to fit in in the world -- not when they are already a decent person who has nothing wrong with them.
I still freak out a little when I'm around a lot of people, but I'm better now than I was. At one point in my life, I couldn't bring myself to walk to the end of my driveway and get the mail alone. I don't think I had any real reason, I was just afraid of everything and miserable all the time.
The thing that changed that for me was finding a couple of people who like me for who I am (and yes, that is possible, regardless of where you live), and encourage me to be the best I can be. They didn't try to change me, but I changed for the better because I was around people who loved me. I'm still my same shy, reserved self, but I have finally figured out how to be comfortable with that now. Because of that, I'm in a happy relationship, I have a couple of trusted friends, and I finally managed to learn how to drive -- something that terrified me before.
You'd be amazed at how many positive things happen if you just learn to change the way you perceive yourself, and stop caring about the way others perceive you.