DD is 8. She has a wide circle of friends and appears happy. However she doesn't have a 'bff' (to use her phrase!) and although she says this is her choice, she seems particularly keen to gain the attention of one girl. She appears to be a little in awe of her. There are often dramas around this particular child involving falling out with other girls in the class. We don't do a lot of playdates (working ft). Although she seems happy, should I be pushing one close friendship more? It makes me feel anxious that she seems so keen for acceptance from one child. Is this normal pre-teen behaviour?