Sorry for the length of this story I'll try to keep it as short as possible. Thanks in advance for the help and reading this mess.
My guy friend had moved to my city 5 months prior from the US and we plan a trip for NYE to go see his US friends and party. His friends had booked their own hotel and we thought we would invite some of my other friends to come with the 2 of us to split accomodation cost. Things evolve and my friend and her boyfriend who I invited to join my male friend and I end up inviting 2 other girls to join us, again to save on the accomodation cost. I meet these 2 girls for the first time a month before our trip and we end up really hitting it off. Things start to go south when one of the girls starts hanging out with my friend who I initially planned the trip with.
We had made a reservation to a Michelin star restaurant 4 months prior with my guy friend. This reservation was supposed to be 2 weeks before the trip so we discuss cancelling it to save money for the trip. A week after my friend told me "Yes I should cancel it" he tells me he hasn't cancelled the reservation and is taking one of the girls that got invited to our trip. I'm upset because we had talked about it a lot and I was under the impression that he cancelled it. He said he never said that he did and didn't ask me if it's ok to use our reservation for the date because he assumed it would be ok. Which it likely would've if he had asked me beforehand.
Fast forward to the trip I talk to the girl and my guy friend before the trip that it's supposed to be a friend vacation so we all expect them to not lock themselves into the bedroom, and they both assure me they would never do that. But that is exactly what ends up happening. They both claim they were sleeping the entire time but when I confront them about hearing them talk they change the excuse to resting. They would only spend time apart once on the whole trip, on the last night when the girl felt ill and came back to our accommodation to rest. The couple I invited first had no problem spending time apart, the girl hanging out with the group when the guy was sleeping. Not the same case with the honeymooners.
But the real issue comes when I decide to stay an extra day at the destination. This girl who clinged to my guy friend had booked the accomodation and flights for convenience, which we all had paid for immediately of course. I had asked for the booking reference for the flights before we even went for the trip, by message and face to face, at least 3 times. Once she told me she will call the airline because she's having issues with it and I say ok. Instead of the booking reference she ends up sending me the boarding pass. So like I said on the last night she goes to rest and when we all return to the accomodation I ask for the booking reference again so I can change my flight. She says it's in her work email and she's too tired to get it. It develops into a fight. I keep telling her I need it now and not the next morning, because I'm afraid it may not be possible to find a seat anymore. She changes the excuse from already having given the code to me, not ever having received the code and me not asking politely enough for the code. I even leave our accomodation to stop the yelling fight and text her politely to give me the code and I will book another hotel to stay in, because I don't want to fight with her and ruin everyone's trip. She never replies to my messages and when I return to the accomodation she refuses to give it to me so I spend my night trying to call the airline and solve it myself. I fall asleep and when I wake up she tells me we need to check out so she can't give it to me yet. She eventually is talked into calling the airline to change my flight. I leave the hotel to find another one and we haven't talked since. During the fight she kept yelling how I've been selfish and childish through the whole trip. He told my guy friend that I should be grateful that she booked everything and I should apologise to her for yelling. I never said anything else to her but to give me the booking code while she was giving me personal insults and telling me how I ruined the trip that I had initially planned with my friend who I now barely had seen on the trip. I made a mistake with yelling and I could've asked for the code more politely, but I was annoyed that I never received it in the first place.
Should I apologise to her or should I just give up on the friendship?