Okay, so heres what is happening. This guy who thinks were friends

Okay, so heres what is happening. This guy who thinks were friends asked me on friday what position i was in colorguard(ROTC). I told him left rifle. So, today was tryouts, and I was up, and i did pretty good. Then he comes in and says," I would like to try out for left rifle." I'm over here like oh my god, what the heck. I already told you I wanted this position. Then he goes and does his thing. Keep in mind he has had NO practice with the rifle. Every time he messed up, which was all of it, I would wince. And then he says he was better than me. WTF! -_-