I have social anxiety and I feel very anxious meeting new people (I avoid it) but am fine with people I know. So it could be that:
OR, it could be autism. These articles/self-tests may help you determine which is more likely:
Of course, the only way to know for sure is to see a clinician for an evaluation.
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism