If they don't like your idea, try your best to talk things out. "I need my space and my time alone, and I would really appreciate it if you guys would respect that more." Don't explode, now! If they are still not liking your idea, leave it alone for a while. Come back to it later.....
Guess what. Not getting along with your parents is totally normal, especially for a tweens and teens. But as you get older, those nasty feelings you sometimes think about your parents changes, and before you know it you'll be feeling the way you did about them when you were three. :)