Talk to your guidance counselor or academic advisor about transferring out of the class. Be honest with your counselor about the feelings youre having for your teacher. If they dont fully understand how much these feelings are distracting you from your schoolwork, they might not be willing to let you change classes.

Is it bad to have a crush on your teacher?

It is definitely normal to have crushes on teachers. If youre having the urge to act on your crush or to let your teacher know, then that can be a problem. As you know, a relationship between you and your teacher is not possible. It is, in fact, illegal, for very good reasons.