Is OTHER wrong in the post ? POST : This happened a little over two years ago, but I still think about it wondering if I was the asshole a lot because it ended our friendship.  I'm posting here to either get peace of mind knowing I was in the right or grow from past selfish behavior.  I've asked people over the years, but they are obviously biased towards me since they know me personally.

A couple years back, my friend was offered a supervisory for an all-day event, let's say an art fair.  The duties required being there or the entire day, hiring workers, and picking up and dropping off the supplies.  He would receive a $100 bonus for both picking up and dropping off the supplies for a total of $200.  

He hired me to work the event which was fine, but because he didn't have a car, he asked me to drive him to pick up and drop off the supplies.  I told him sure, but I requested half of what he would make since the only reason he would be able to earn the $200 bonus was with my help.  He told me no so I offered to let him borrow my car instead or negotiate down to a smaller fraction.  He got very angry because I knew he did not like to drive in the city, and I wasn't willing to drive him without compensation.

He tried to emphasize that he wouldn't be able to do it without me, and I told him that if he knew he was unable to fulfill the duties, he should have recommended me for it instead.  His argument was that it was selfish of me to demand his money  This, however, would have taken at least two hours of my time total, and I felt I was being taken advantage of given he wouldn't even offer gas money.