The subconscious mind of yours doesn't let you be a social animal. Since it started in your early childhood , it might be the defense mechanism because of which you freeze. Anxiety is an unpleasent felling or fear of irrational places,faces or facts. The fear that you are having is rational to you,but irrational to other masses. That's what anxiety is. So to coup up with this take minor steps,and gradually you will overcome it.