Oh, honey. Believe me. I KNOW what color guard drama is like. It just happens. You can't stop it, but you can ignore it. There's no use in giving it any attention. If you give her attention when she's being cocky, that's just giving her what she wants. But on the other hand, are you sure she's being cocky? Or is she just proud of herself? Making the rifle line is pretty great, especially when you're just a sophomore. As far as the boyfriend trouble goes, talk to her about it. Tell her it bothers you and see if she fixes it.