@DewdropNeed to learn how to argue? OK, it goes like this: I say "No, you don't!" And then you say "Yes I DO!" And we repeat that over and over, until someone gives in. That's the gist of it.
He can't and he won't do anything to your parents! People like him try to get their pray by telling them lies to control them.
The best thing you can do is tell your parents about it, avoid walking around alone and above all, do NOT do anything ON YOUR OWN.