[X] Say that you can't tonight since coming to school with injuries would put your scholarship in jeopardy. However you're not averse to fighting on say...Friday night since you don't have classes on Saturday this week. You can use the weekend to heal up.
[X] "This guy took on an army of a hundred people armed with guns and rocket launchers and beat the crap out of every one of them without breaking a sweat."
[X] "So apparently the devil person was walking home one day when someone drives a bus into him. However, instead of dying, the Devil got back up and goes and beat up the driver." Monstrous Toughness
[X] You say fine. After dinner, the two of you will find some secluded spot and fight. It's been awhile since you had a proper fight so you'll take what you can get. Even if the two of you ends up pretty banged up afterwards, it's just asmall price to pay to feed your battle lust.