Hello, Some degree of social anxiety is common in the general population. Such anxiety only becomes social anxiety disorder when the anxiety either prevents you from participating in desired activities or causes marked distress during such activities. The most effective treatment is probably one that combines medicine, psychotherapy and supportive approaches

You are most likely suffering from social anxiety. You should meet a psychologist/ psychiatrist to improve confidence, learn relaxation exercise and slowly come out of your shell. Severe cases need medication as well. All the best.