Twin Sister

I have a twin sister . She is about one minute older than me. She never lets me forget it. She makes sure that everyone loves her more than me. If someone likes me more than her she does whatever she can to change that. If its a boy, she will text them all the time and hang all over them when she sees him. She doesn't care that i like him. She only cares that she isn't on top. She makes sure that our parents believe everything she says and makes me look bad. Yes i have a short temper but my sister will bring up stuff that sets me off in the middle of class so i will get mad and then she will drag other people onto her side so that they hate me. If anyone is mad at me or doesn't like me, she will become their best friend to make sure that the hate me forever. I have no idea why she does this. All the guys want her and not me. She is prettier than me and will pretend to be drunk so she can hang all over guys. I dont know what to do, its driving me crazy!! One minute she will act like my best friend then the next she hates me.