my friend in the class

In the classroom, there is a girl who is always laughing and saying stupidity, she's a little strange, that's why she's my friend!
We're friends since last year, and we're always together at school.
She has a cat, and a little brother, and she lives only with her mother, her brother and her cat. She loves wearing  black clothes, like me. She's only 16 years old, but she's already working.
She's very mature and independante, with her we can talk for hours about different subjects and without being bored, I think it's because we have the same character.
She loves watching series on her computer: one of her favourite one is "Gossip Girl".