So me 22m and my gf 20f got into a argument as you can guess from the title about a ps5 for context its my money i pay the bills and i pay for the groceries and in a few months we are supposed to go to this festival in vegas and she is constantly telling me to save for this trip which i will admit i haven't been the best at but I'm the only one who is saving and there's multiple people going. So this friend from work was telling me that he has a friend selling one for a good price so i set everything up and had the money in hand and before i did anything i told my gf what i was doing and she flipped out on me yelling and screaming about we need the money for this and we need to save for that im well aware of what i need to do and i will have the money for it but she was having none if it. So am i the asshole

Edit 1: yes to clarify gf doesn't have a job

Edit 2: just some more info there's 5 to 6 people going and at least 3 of them including me have a job but im the only one actively saving money