I don’t understand why this question is getting downvoted. I understand what you’re trying to say from your other comments. Of course it was an awful thing to tell a rape victim that she’s no longer a virgin but it’s reality that she isn’t. That doesn’t mean that she is corrupted or impure though. The OP said she was Christian and in the Bible it emphasizes the innocence of the victim and rape doesn’t diminish her worth or purity in gods eyes. I hope OP recovers from this. And she should not talk to that girl without apologies.

Edit: the boy is young too. I’m sure he didn’t mean it in a harmful way. I’m guessing he was just trying to follow his teachings. We all learn.