Its detrimental you tell the police and even your best friend, you should tell someone because its damaging to keep it in. It sounds silly but its like the Lady gaga song, you dont know how it feels to be raped till it happens to you, so I cant even imagine what it feels like and what you're going through but if there is one thing I know, dont be alone in this, if you've taken the steps to post it on here, then take the steps to speak to the police, family, friends, anyone who can help before it happens to someone else, the person who did it deserves to be punished, dont let him keep thinking he's gotten away with it.