Wtf! His ex says she was closure…

I been with my new boyfriend 19 months. Happy as can be. He has a clingy ex. They share nothing together besides memories .. whatever. She knows he’s in a relationship with me. He told her was over numerous times and that he’s happy. Now she demanding closure but face to face. He tells her no and she won’t hear of it😒! Just hardheaded. I do not understand why some people can’t get the point! I’m getting fed up. Like girl… just go away now. Wtf do you want!!! I think she needs to physically see us together for her to get it! Should I go with him?