You seem to be suffering from social anxiety disorder along with some personality issues as well. With time and proper treatment, it is possible to overcome these problems. Best would be to consult a psychiatrist and also collaborate with a psychotherapist for optimal treatment.

This is a  personality issue you are dealing with. The first and foremost step required to deal with it, is to own your personality. Personality cannot be changed but behavior can. So behavior modification techniques should be followed. Don't push yourself into tuff situations rather, acknowledge where you are and what are you thinking. You will definitely feel calmer which will help you to elicit your behavior properly.