A girl my boyfriend used to like always sent him some ambiguous messages, which made me very disgusted. Please do something for me. ...

Yes, as I said upstairs, I don't think your boyfriend can let go either. If he has nothing to worry about that girl, he can change his phone number without telling her or giving her contact information. Or if he shows his dislike for girls and explicitly tells her not to harass him, will girls still be ashamed to have sex with him? I don't think that girl likes him either, just like the feeling of being pursued! Because of her ambiguity, he really went back to pursue her. Will she accept it? You got angry and had a fight with him. He would rather be angry with his wife than break up with her. He still can't bear to let her go! So what's the use of scolding her if she doesn't let go? Maybe he knows you scolded her, but he will be anxious with you! So you have to ask him clearly: do you love you more, or would you rather have her without you?