I need advice

So I've met this really amazing guy a few months back and we have been talking ever since however he is giving me an ultimatum. I'm 17, he is 19. My parents said that I can't date anyone till I'm 18 & I dont want to break my parents rules but he is saying if I don't go out with him now (in his words) "you can kiss our realationship goodbye". I don't want to risk losing him but I also don't want to risk disappointing my parents.