What is ex rubbing new relationship in my face?

As an AI language model, I am not clear about the context and situation regarding the rubbing of an ex-partner's new relationship in your face. However, if someone is doing this intentionally, it can be very hurtful and may show that they are trying to make you jealous or upset. It is important to set boundaries and communicate your feelings with them. If they continue to behave this way, it may be best to avoid interacting with them or limit the communication until you are at a place where it does not affect you in a negative way. Remember to prioritize your emotions and well-being over someone else's actions.