I would advise against going to the police. The police is very "school of the hard knocks" because they're used to seeing little girls butchered and stuff. So they won't be gentle and will ask for graphic details without any emotion. They also might not believe you, as rape cases are very hard to prove. They will likely ask why you waited so long to report it, and start making up ulterior motives, which may feel like a second assault.
Work through the rape with a therapist and don't get in a relationship until you're truly ready. Some people aren't meant to be married.