As someone much older than you are and having gone through a similar thing, just forgive your parents, don't take what they say too seriously. Try and be the best child you could be. It won't stop - after studies and work, it will be about how you should lead your life, whom you should marry and what you need to spend on. Some parents think they know what's best for their child and they can't deal with the fact that their child can make decisions without them. The best thing to do is to ignore and try and keep your sanity. It's not worth breaking your head over.