If someone raped you, would you come forward?
I can understand asking the question "what do you want me to do". The reality is that once a set amount of time goes by, it boils down to he said she said which isn't enough to secure a conviction.
However, that doesn't mean not understanding why victims don't come forward. Sometimes, blocking the experience our and moving forward is the easier option. More so if there is that fear that the person will get away with it and you will be forced to live with the knowledge that your plea for help was rejected.