It's completely irrational, I know. I'
m 16, and she's about 15. My boyfriends 19. Shes really cute and a cheerleader, and they're really close. He says shes like his sister, and he acts like her older brother, but how close they are bothers me. It's extremely irrational and annoying to deal with, but I can't stop myself from being super jealous of her no matter what he tells me. I do love him and...