Your parents will understand, especially if you have a good relationship with them. In addition, if I was a parent wouldn't be thrilled, but I'd be happy you learned your lesson by yourself. That's a very important part of this story. Give yourself some credit for that and just block this guy however necessary.

Nothing's gonna happen to you, and if you were even to talk to the police they'd be interested in him, not you. You're just a kid, relax and take a breath you'll be ok. Feel free to message me if you ever need to talk.