maybe I am not getting it or I read it wrong
but you said here you took it easy on him
well if that means he said "what do you want for gas" and you said 5 bucks or maybe nothing or maybe you said don't worry about it..then you stole his combo..give it back
but if you said "you know we agreed to split the cost and I know you are hurting so I will let you ride for a short time ,then you have to pony up what you owe me"... then the combo is yours
but if you did not make yourself clear, then who is the bad guy
again I don't know, I am posing a questions not stating facts here