I, of course, cannot endorse violence against a female. She has, however, challenged you to a legitimate gloved boxing match - a little different than bare-knuckles-meet-me-in-the-alley. I understand your dilemma, Bozco...well, maybe not understand, but I can sympathize.
Unfortunately, you\'re not going to have the luxury of explaining all the details and past history of how the \'bout came about to most people. A lot of people are only going to see that a strong, fit male took on a slow, large female. You\'re not a professional boxer (no offense) - what if you accidentally break one of her ribs, or her nose? Are her parents going to understand? Are yours? Teachers, principal? If you\'re planning on going to college, this is a crucial part of your high school to college transition, and you don\'t want an event like this to mar your reputation.
It sounds like the best thing to do is swallow your pride and ignore her taunts. Tell your buds you don\'t believe in hitting women or something.