I'm going to change my mind on about going to a school dance with a girl
Why don't you want to go with her?
I feel zero emotions for her, I just don't want to spend 3 expensive hours with her. Plus I don't want to pay the 35 dollar that the tickets cost. I'm not sure why I asked her out in the first place.
I get your point, but people expect others to follow through with plans. You should always honor what you say you're going to do.
She'll be fine. I'm sure that some guys will show up to dance with her. She doesn't seem to care about me either.
But if you made plans you just should go through with it. I think you can give her an excuse in the middle of the date though if it is still not going right. I would fend sickness and then go home, maybe drop her off or let her stay if she wants.