if you have been already diagnosed as social anxiety disorder
then start treatment now as it hamper day to day life very significantly. If you are guessing then better consult psychiatrist
and discuss that there is no other problem as depression
usually accompany this problem. Both medicine and Non-medicine treatment available and combination is better then alone. Don't avoid interaction with people but try to interact more and think that this is limiting to social context and anxiety does not result into any physical or any other kind of harm, at most transient apprehension, tremulousness, palpitation
etc will appear for short period.
Hope you will recover soon.