What if I don't like playing volleyball anymore?

I do & I don't. My coach is mean & I don't like him. & everytime I have practice or a game, I get so tense & nervous. I know I'm good at volleyball, & people say I'm good. But I hate getting so tense & nervous all the time. I'm not allowed to quit. So,...

how do I get through this volleyball season?

If you like volleyball, then you should focus on having fun playing the game. From the sound of it (I may be wrong), it sounds like everyone's opinion keeps you stressed about the game. Don't sweat what everyone else thinks about your playing, you should focus on playing for you and having fun doing it. Don't let anyone else ruin the game for you.