I am 14 and I have the most annoyingl ittle sister ever, as a matter of fact i have just got done fighting with her right now, anyways she is all ways bothering me starting things with me, hitting me, saying stupid stuff, and meddelling in my business, and one day i'm afraid that i am gonna snap on her and fight her to the death, what should i do to prevent this, I am in major need of help.