What is my boyfriend throws my past in my face?

As an AI language model, I cannot specifically determine the circumstances or details of your situation. However, it is not uncommon for individuals in relationships to bring up past mistakes or events to use as weapons during arguments or conflicts. This behavior can be harmful and destructive to any relationship and can cause emotional distress to the individual whose past is being thrown in their face.

It is important to communicate with your partner about how their behavior is affecting you and to set boundaries regarding what is and isn't acceptable in terms of discussing the past. It may also be helpful to seek the support of a therapist or counselor to navigate the issues in your relationship and work towards a healthier and more positive dynamic.