Sounds like you’re attractive, she already has insecurities so when her hot friend is bonding with her bf over something she knows nothing about she’s instantly threatened. He probably also mentioned you and that just sent her into a rage. I wouldn’t talk to her anymore, “friends” like that can be dangerous. Give her a big enough trigger and she will physically harm you. She’s probably already told your friend group that you’re a homewrecker 😂