A hypothetical situation...

If the trip is your idea and you invited them to go along then you could offer to pay for the gas and accomodations. That would be very nice of you. I think that if you guys aren't married or living together you should divide the expenses right down the middle. If the other person can't afford it and you really want them to go along then you can offer to pay more on the gas or accomodations just so you can have their company on the trip. In this day and age it would make sense to talk about dividing the cost.

If I was the one wanting to go and I asked my boyfriend to come along than I would expect to pay the gas but I think if he agreed to go that's an indication he did want to go therefore he should pitch in a few dollars whether it be for gas or meals. If on the other hand my boyfriend asked me to go with him I feel he should pay the gas but my nature would bring me to offering to pitch in for meals. It'll be interesting to see how others think on this situation. Take Care.

Usually when we go for a drive, someone always pops up and says "we all should pay for the gas," and I say no way, because I might want to pay for the meal or leave the waiter the tip, etc. but usually we have all agreed to go on the trip and I expect that we will do what we can to help out even if it is weeks later. But when you are going for a trip he should at least offer and when you are at the cafe or the restaurant, it should be dutch. You pay for your meal, he pays for his. It does not matter if you tied the knot or not. And if you are sleeping overnight, you pay yours, he pays his. With gasoline, one cannot figure out because you may have already filled up before going on the excursion, so unless you are a mathematician, you have no idea how much is when he took you somewhere, when he borrowed the car, or when you decided on where to go.

If you both decided to go on the trip and you are going to see mutual friends, then you should split the gas 50/50. Unless you just invited them along to keep you company or soemthing like that...then you should cover the expenses.