Did you destroy his dissertation?

Personal experience here, if he's a new boyfriend dump him. No one ever wins in the rumor mill game, and if this is what she's like at a first meeting where you're suppose to be your best self, she's only going to get worse. The best thing you can do is distance yourself from it. If he's a long time boyfriend, dump him. He obviously doesn't have your back and if he doesn't trust you what good is your relationship in the first place. Good men are not hard to find. Get a different one.

Seems like she's the jealous one.

This time a girl is in the friend zone.

Sit down with him and explain what happened rationally and calmly. I'm not sure how you approached it in the first place, but if you just started throwing accusations out it probably didn't sound that credible. If my bf told me that one of my best friends who I love and trust threatened to stab him, I probably wouldn't believe him at first either. You just need to let him know that you're totally serious. If you have to go as far as confronting the friend and recording the conversation then do it. No one should be able to make you feel uncomfortable in your own relationship.

Record her then show him or put on your big girl panties and show that bitch what's up.

Get a recorder for next time...

Definitely sit down and talk to both of them after you get her threat recorded. Nobody should have to deal with that nonsense.

This happend to me except she never said stuff like tht to me she literally took everything i said and turned it around on me and cried and said i harassed her and his family beleived it . Every time . So youre not alone , literally just ignore her .

People's true colours always come out just leave it and he will see eventually !