Writing about a Partner

My best friend's katerine and actually she is  23 years old like me, but we have known each other since we were 8 years old. She's tall and thin. I think she's very pretty: she has got long brown hair, a small nose, black eyes and a beautiful personality. 
She's outgoing and always we're laughing about something, because she's funny and has an amazing sense of humor. However, she always listen me when i'm sad. I know i can always count on her. She´s a great friend!