Ex boyfriends

A. • 🌻
I broke up with my ex boyfriend. And it was the hardest thing to do. I told him we would get back together when I'm ready and he said okay. He would wait. But he didn't. He is now dating some other girl and I still like him and he knows that. He is always rubbing her in my face saying "she is this.." And "she is that...." What should I do.