So glad you decided to tell someone you trust and they are giving you some good advice. Police will do an investigation. Interview you and ask you questions, like when and where this happened? Is there any videos? What happened? Who did it and the relationship to you? Any drugs or alcohol? Any weapons? They might want to do a physical exam on you. They will interview him too. Then if they want to press charges, he could be arrested. You could ask for a restraining order if you don't want to press charges. Then you can feel safer and have no contact with him. Glad to hear you are taking this seriously and not putting yourself in that position again with him. I feel like he would pressure you again at some point if you continued being in a relationship with him. Stay strong and you will get through this.