Never Force Your Child Into Social Situations Where They Are Not Comfortable
At this time, you must understand that each child is unique with his or her own social and emotional abilities. When your child is not comfortable being part of a social situation, never force her.
You can have a talk with her in private and find out what’s bothering her. It could be a new social situation and she wants to be with you. Acknowledge her feelings and assure her by saying, “It's fine. You are getting an opportunity to make and play with new friends. Introduce yourself and join in.”
If she is still not sure, you can say, “Okay, you can try after sometime.” However, don’t make it a big struggle between both of you. Never label your child as shy or introvert in front of the guests, friends, relatives nor feel awkward about her being with you throughout till the guests go. Give her sometime and she will be fine.
Find out from her teacher, her interaction in the class with her peers.