Last weekend I did a short trip to a nearby town with a girl I met on Tinder, we hanged out and had sex couple of times. this girl is working/medium class financially and she would come over to my house and I would invite her small things like fast food or share a bottle of wine. Last week I told her I would go on a trip and that she was welcomed to join me. I never mentioned paying for everything. The minute the trip started every time the bill came she would not offer any money so I started paying for everything and told her I would take note of things I pay so she later gives me her part. She agreed so I payed for the hotel room, a day long tour, taxis and all food. She came to the trip with no money so I had no option except for leaving her there but decided to stay with her and pay. At the end of the trip she told me she would later send me her part but 5 days have passed and we haven't talk since then and have a feeling she will never do. I had a very good time but I feel really bad with what happened, I feel used. what are your perspectives?