Is AUTHOR wrong in the post ? POST : Hey, so first time posting. One of my best friends started dating my best online friend. We'll call best friend Miranda and the online friend Dane. Miranda asked permission before starting to see Dane. I was apprehensive but had no reason to say no. They were basically fwb until he started to feel all the feels. He wouldn't talk to me too much about it. Which was fine and better off really. 

Things got a little weird after Miranda had made a joke and Dane took it too seriously. She decided to call it quits and he was pissed. She stated her feelings had fizzled out. He confided in me and I felt for him. They ended up sleepong together again the day after. He took it as they were working things out and she just thought it was a fuck. She assumed he knew this. 

Nye comes along and Miranda meets some dude and makes out with him continuously for hours then proceeds to take him home and sleeps with him. At this point I'm mad. I dont think Dane deserves this. He asked me if she was ghosting him and I said that she got really drunk. I felt as though it wasn't my secret to tell him. I did tell her that she needed to come clean. Am I the asshole for not telling him?  

He thinks so, he found out. Called me a lying two faced cunt and said our friendship was over. He's been one of my bestfriends for years and I'm truly hurt. I didn't know what I should do because she's also one of my best friends. She did fuck up hardcore though. I guess I'm just lost in this mess. 

TLDR: Best friend cheated on other best friend and I didnt say anything feeling as though it wasn't my secret to tell.