I just fingered my best friend and im a dude HELP?!?

okay so i was with my best friend we were on her bed hanging out prank calling people, and all the sudden out of the blue we started making out. i never saw it coming because she told me she only liked me as a friend and i would have never saw it coming. that's not where it stopped it got further and further until i started fingering her and she was giving me a BJ. we have talked about it she said she wanted it to happen and is glad it did she told us to bury it tho and we laugh about it but for some reason im a little iffy about it like i dont know why it happened can someone help me please