My DD (14) is very sociable but she doesn’t have a gang of friends. I always see big groups of teens hanging out together and wonder if she is missing out - I think she wonders the same too. She has a small number of good friends who she is out with regularly but sees them all on a one to one basis.
Until recently, she also had a lovely boyfriend who took up much of her time but this has finished and she’s a bit lonely as a result.