Is OTHER wrong in the post ? POST : Three friends and I crossed part of France (12h for the whole trip) with my car to rent a cottage in the mountains in order to spend a full vacation week there.  
we had planned to share the costs (cottage rent, groceries, and some activities) in 4 equal parts.  
One of my friends has fully paid the costs during the week, and after the trip, we will pay them our share.  
On the other hand, I did not specify, before the trip, that we should also share the costs during the trip (fuel, and gate tolls).  
  
at the present time, the holidays are finished, and the next time we will all see each other, everyone will pay the money they owe.
But I find it unfair to have to pay the full cost of the trip, when I have agreed to take my friends to the mountains.  
would I be labelled as an asshole if I asked them to reimburse me for part of the travel costs, when this topic has not been mentioned (my fault), and the holidays are already over?

