as Brysing said, we don't know your age, but i'm guessing you're in high school. growing up, it was a rule i wasn't allowed to date until i was 16. my mom and her brother had that rule too. if i have kids, they will have the same rule. the reason a parent would make such a rule is because you are young, your hormones can get the better of you and you could make a mistake which you could regret for the rest of your life. granted, you could go behind their parents back. rules are put in place for a reason, not just to 'make your life miserable'. i would talk with your parents calmly, and explain why you wish to be with him.
magickally, you could try a honey jar to make your parents listen to you. if you are in high school, its not as long as it feels, if you and him belong together, then the two of you will wait, and be together in the future. if you or him can't wait a year or three, then it might be better if you don't go out. just saying. good luck to you.