So me (18f) and my best friend (24f) went clubbing and there was a guy he was fully flirting with me and I did feel him too. The issue is he and my bff had a little fling a while ago, nothing serious and it was something maybe twice. But before I even did something with him I went to her and ask if it’s alright for her and she said it is. So she left early with another friend and I stayed at the club with him and spend the night with him. The next morning I got a text from her how disappointed she is in me and lost all trust in me and want to end our friendship because I broke girls code. I do get it girls code but I did ask her for permission and she gave it to me. And when I ask her why she gave me permission if it’s not okay with her she just answers "do u know girls code". If it was something serious with him or she had feelings for him or it was something recently I would have never done it but it wasn’t. I apologized so many times to her and explained to her my reasons but she just tells me how she lost all trust in me and I don’t know what to do, she is so important to me and I don’t want to lose her. I’m just trying to understand if it’s worth breaking our friendship up.