last night i was hanging out over at friends' house, and we got into alot of stuff and were pretty out of it. my friend ordered pizza online and paid for it with his card. when the pizza man showed up my friend was taking out the trash so he got me to get the pizza from the guy. i didn't know my friend had already paid for it and the guy told me how much it was, so i gave him the $13 price + $2 tip. he left then my friend came back and i told him the price so he could give me some money, but then he was like 'wtf i already paid for it.'

we were too wasted to do anything about it and the guy had already gotten away. what do i do now? what would you do?