Reading your symptoms, it seems that you are more an introvert than extrovert. Without much regular interaction, expecting to know the faces might be difficult. Probably you need to improve in this aspect - develop assertiveness, initiate conversation, maintain eye contact etc. You may get inputs from Psychiatrist or Clinical Psychologist
Next Steps
Kindly visit nearby psychiatrist and take help. you may also consult online
Health Tips
Have confidence in you, do not get anxious