Traveling alone with ordinary female friends, should I pay for the trip or not?

If you are not interested in her, you should politely tell her that you are just an ordinary person and have no extra money, so you can only go AA. If you don't want to, don't go with them. I really want to know whether these girls are cheeky or too thick-skinned. If you are not their boyfriend, you have no obligation to pay for them. A man's so-called gentlemanly demeanor can treat his girlfriend, not them. Friendship is mutual, and you can't just pay blindly. If they insist on asking you to pay, they can't be anyone's friends at all, and it's not worth paying.