I agree with all of the guys who say just get out and politely part ways. Aviation is a VERY small world, and you never know when something you did a few years ago will come back to help/bite you... I once had an AA captain recognize me in his jumpseat as the CFI who gave him a rental checkout in a 172 three years earlier...

Always take the high road, and always leave as the better person. You never know who's watching or who will remember you.