I have some difficulties in a relationship with my sister. We don't get on very well. She is often nervous, talks to me very seldom and acts like she does not respect anyone. She says that she does not need someone's advice, she knows what she is doing. She is 14. I know these problems are beacuse of her teenage period. But there must be any solution, any compromise. I know, I'm not an angel either and I also made mistakes that made her angry. But now I really want to be friends with her. She doesn't forgive me, although I forgave her for her mistakes. What should I do, how should I act?