I fucked my cousins friend

Before anything really happened between us she knew we both really liked each other but she would always tell us we can’t be together because we were both going through a lot in our own personal life’s and a relationship wouldn’t be the best thing for us to do and we respected that. She’s 2-3 years older than us. And then a couple months after that there was a time we were all drinking and later that night after we left, we went to go see each other and we fucked. I feel bad for doing it but idk