People who suffer from social anxiety disorder know that it doesn't make sense, but with any type of anxiety you have to realize that there is nothing to be afraid of(no one has ever died from an anxiety attack)and seek professional help to learn how to alleviate anxiety and its symptoms from your life.
Find a specialist who knows about these problems and knows how to treat them.
Find a support group that is encouraging, positive, and supportive.
Make a commitment to carry out your therapy.
Repetition in these situations is the key to your recovery.
Don't give up!