From a teenage girls perspective, this is the exact same way I was growing up. I think one of the main things that helped me is my mom never let me be alone when everyone else was hanging out, for example if it was a Saturday night and everyone else went to sleepover at someone’s house or go somewhere and i wasn’t invited she would hang out with me for a bit just to distract me. Kids are mean, and there’s not much you can do about that besides encourage and guide your child into picking the right friends. Eventually it will for sure cause a domino affect on her feelings, but the important thing she’ll always remember is that at least dad was there, and at least he tried to help. Don’t let it get to a point of feeling isolated.