This girl on Facebook is such a brat?

there was a girl in my dance class and she was always kind of mean and annoying. one time she was talking about auropostle to another girl and then she came up to me and said "have you even heard of auropostle" so yah thats annoying lol. i added her on facebook lol and i was bored and sent a message to her and said how old are you? 11?12? and she sent a message and said 12? and i sent 1 back and said nice. im 13 and she sent 1 back and said ya but you play hide and seek. she said that cuz my status said "just got done doing fireworks and playing hide and seek with neighbors...tiring. so then i sent one back and said "what? did you get that from my status? a bunch of 8 year olds were begging me. she hasn't sent one back yet but what do you think she'll say? should i delete her? i kind of dont want to yet cuz i want to see what she'll say and i also want to dislike some of her photos but would that be imature? and i know a girl whos nice and shes friends with her so i dont want her to see that. help? thanks!