so i have two younger sisters. one is 14 and the other is 13. i love them both dearly. i usually get along really well with the 14 year old. but recently she's been acting like a royal freaking bitch.it's all because she's a freshman on the high school varsity cheerleading team and recently started dating this kid. he's a nice kid and I'm glad she dating him rather than her ex who was a major...