Why does my girlfriend feel nervous during small parties?

Name: SumitaDate of Birth: 12th May 1997Place of Birth: DelhiTime of Birth: 7:25 PM

Small crowds cause my girlfriend stress and nervousness. She does not talk much and appears to be edgy even in the company of friends. I question whether her placements of Moon or Rahu-Ketu are what cause her to be socially sensitive. I wish astrology would tell us the reason as to why she is in that situation and recommend how she may feel confident and comfortable.