I don't think just going to high school means you immediately drop what you liked when you were younger. Childish is a a relative term. I know a lot of people that think video games are childish but I love them. There are people in there 50's that collect comic books and baseball cards.

Why does society have to dictate what you should like at any age.

I don't care how old I am I would like to see some one stop from picking up the next batman comic.

While you may think you friend has not grown up she might be thinking you have grown up to fast.