Is it normal for a child to have considerably older friends?
The child in question is a nine year old boy. He is bright, funny, and gregarious, with some natural leadership skills. He gets along fine with other kids his own age, but he prefers to hang out with kids who are eleven and twelve, and even thirteen.
It doesn't seem so odd, perhaps, when he is hanging out with eleven or even twelve year old boys, especially as they share common interests. But the thirteen year old is a girl, which I personally find a bit odd.
I always thought girls were supposed to be more mature than boys. I can't think of any older girls who wanted to hang around with a boy four years younger than themselves, when I was a child. This girl calls the boy her "best friend," but she is often quite callous and even somewhat cruel to him. He often comes home angry or upset after interacting with her, and they seem to spend most of their time together bickering.
I feel it is an unhealthy relationship, and the girl should be focusing on girls and boys closer to her own age. Am I being "agist," sexist, or otherwise delusional? I would appreciate hearing others' perspectives. Thanks for your time.