I'm trying out for my school Badminton team but my partner always blames me for not winning.?

I'm in middle school and i'm trying out for doubles badminton, but every time i miss, she tells me to "calm down" and just hit the birdie. I think I'm actually pretty good, and she is too but if we don't make the team, (we already made the first cut!) then I'm worried she's going to get really mad at me. She's too competitive! What should I do?