What's happening?
Yesterday they did everything together. Now she hears about plans after they happen, or sees her old friend laughing with a different group. Nobody announced an ending, but something has shifted.
As interests, schedules and social circles widen, friendships move. A girl can enjoy new people and still miss the comfort of an old routine.
What's behind it?
Friendship change is far more common than it feels. In one study that followed children for about six months, about three in four ordinary classroom friendships lasted. But only about half of "very best friend" pairs did. The closest bonds were the ones most likely to change.
How they ended is telling, too. In the very best friendships that didn't last, researchers didn't see more fighting. They saw the warm parts (caring, companionship) fade. So a close friendship can end without any fight at all, which is part of why it can feel so confusing. There's nothing to point to.
What she misses may be the friend, or it may be the place that friendship gave her in the day: who to sit with, who gets her jokes, what to do on Fridays. Those are worth telling apart, because they have different fixes.
You and her
When friendships shift, it can look like she's pulling away from everyone, you included. A study that tracked kids' days from 10 to 18 found that the share of waking hours spent with family fell from about a third to about a seventh. But the pull came mostly from friends, activities and freedom outside the home, not from conflict at home. And time spent actually talking with parents held steady, with girls in particular talking with family more about personal and relationship matters as they got older.
So while her friendships are in motion, you may be one of the steadier relationships she has. A regular, low-key chance to talk, like the drive to practice, gives her somewhere to bring it.
What this might look like
The girl who came over every Friday is suddenly busy with a new group. Your daughter says, "We're not best friends anymore," even though they never fought.
Something to try today
Ask what she misses most: the friend, the time together, or having a plan. Then let her choose whether to reach out, spend time with someone else, or simply miss it for a while.
One thing to remember
A friendship that drifts isn't a verdict on her worth, and it doesn't erase what that friendship meant.
The research behind this
Original sources and research limitations
Ages are a guide, not a deadline. These findings describe groups, not every individual child. The examples and suggestions are Neon Pink editorial ideas.
What the research found: Over about six months, roughly 76% of classroom friendships and 50% of very best friendships lasted. Best friendships that ended showed fading warmth rather than more conflict.
Who was studied or consulted: Second, third, fifth and sixth graders rating a self-chosen friend and best friend (McChristian, Ray, Tidwell & LoBello, Journal of Genetic Psychology, 2012; abstract, also on PubMed).
You and her: 220 middle- and working-class children who reported what they were doing at random moments, followed from ages 10 to 18 (Larson, Richards, Moneta, Holmbeck & Duckett, Developmental Psychology, 1996; abstract and University of Illinois release). An older US sample; averages, not a forecast for any one family. The drive-to-practice idea is Neon Pink's.
What it doesn't tell us: Whether any particular friendship will last. Friendships were self-reported, and the follow-up was short.
Also drawn on: CDC, Middle Childhood 9–11 fact sheet. The Friday example and questions are Neon Pink's.