AC1201, your boyfriend's reaction isn't out of the ordinary. It is often the first reaction to blame the victim for being raped - I must have done something to "deserve" it or encourage the action. This is NOT true and is one of the terrible stigmas regarding sexual assault - because of the very nature of rape, it is wrongly assumed that the crime is committed for the sole purpose of sexual gratification, and it is NOT. It is a crime of hatred, anger, rage, and control. Period. Sex is just the means to an end.
Your parents may have "high standards," but you deserve to be protected and vindicated. I would strongly encourage you to tell them and file criminal charges as soon as you are able. And, it may be a wise choice to avoid seeing the boyfriend for a while. Something doesn't "sound" right about this whole situation, and it would be an option to protect yourself, right now, while you recover from the assault.
Again........my very best wishes to you and you're strong and courageous - you can recover from this without allowing it to define who you are.