Well your boyfriend said it to you, not to her.

People make all kind of comments to their significant others, it’s not meant to be repeated to people that were discussed.

What was the reason you repeated it to her? Personally I’d be upset with my friend for repeating hurtful things rather than being upset with a boyfriend whom she doesn’t know and who just said things in privacy of his own home with no plans for it to be repeated

Like if I saId to my husband I think our neighbor is nuts and he’d go to the neighbor and said my wife thinks you are nuts (hypothetical example). Why repeat such things?