This can be difficult, but be sure to take any advice from your parents, for they've been in your situation. It use to always amaze me, how they could be so right about former relationships. "Most" of the time, parents can see through a persons true intentions.
like they are saying .. it is good to listen to advice whenever your parents give it to you.. they have been through alot more then you have .. & get him to go around your parents more though so they will get to know him better
You said they don't think he is 17, how old are you? Also have him show them his license. That should prove his age. I really hate to say this, but their house their rules. But you do need to listen to your parents, your still young and maturing. Parents already know the game.