Just sit down and talk with them. Be calm and act mature so they know that you can smoke responsibly. I did this before I ever got talk, it takes guts, but is worth it. And your parents aren't trying to take away weed so your miserable, they're doin it because they beleive that it will interfere with schooling and other important stuff and make u a stoner bum when you grow up. Get good grades, dont fuck up, and they shouldn't have a problem.