Should I step out from this contest or just stay?

Okay, there is a group dancing contest in my school and a few days ago, my crush asked me if I wanted to join. I joined it because I wanted to be with him(I know it's pathetic) even though most of my enemies are in the group and plus, the mid-year exams are just around the corner. After a few days of practising, my crush sent me a message saying he had to quit because he's sick. I dunno if I should step out too but it would be harder for me to quit since I don't really have any reason and plus, the rehearsal is on Monday and the competition will start on Tuesday and today we have a practice. My mom wants me to quit because I recently got a terrible result in recent test, so what do you think and what should I do?The choreography teacher is very fierce and I'm kinda scared. ;(