It is not up to you or your parents to press charges. The police or the prosecution file charges. Please get some counseling. As a victim you are very vulnerable right now.
Neither your parents nor you press charges. That is done by the district attorney. However the prosecutor does take into account your I was wishes. The fact that you blacked out means you probably did not consent but even that is unknown. However your decision to drink as a minor and your lack of memory and your reluctance all weigh against prosecution if they know the suspect. If your blood had a date rape drug spiked in your drink, the likelihood of prosecution is greater no matter how you feel.
Whatever happens I hope you can forgive your own bad judgment and in a sense forgive the rapist not for his sake but for your healing and well being. Don't let this define who you are or limit your future in any way.