There are two things to consider here: your parents and yourself.
I know where you're coming from:
I'm 20 and go to college out of state, and I'm in a very similar situation to yours. I have nothing to say to my parents when I'm here and they bug the hell out of me a lot of the time with their questions. It's impossible to relate to them anymore. I'm one way when I'm home but different (and more affable) out. They had my brother see a psychiatrist over the summer because they thought he had issues but really I think it's because they don't know us at all. Our home isn't the most functional in the world, and there is a terrible lack of communication.
But I NEVER let things get nasty, as much as I can't deal with their crap sometimes. Truth is, they care about you more than they don't. And like it or not, you need them and they need you. In other words, keep the big picture in mind and don't let details ruin things.
First start by asking yourself when you started feeling this way. Then ask yourself why. Take an honest gut check. Keep in mind two key points, respect and communication. ALWAYS show respect to them, even if it kills you. DON'T piss them off. Second, attempt to discuss things with them once you've thoroughly thought things through. Has your behavior changed recently, or theirs? Maybe it's neither, and you're just coming to the realization that they do a lot of things that you disagree with or that bug you that you may not have seen before, possibly because you weren't mature enough to notice.
These kinds of things are usually pretty complicated, so your frustration may have a multifaceted origin and it's usually not just a "me or them" kind of thing. My family has a lot of problems and I finally mustered up the balls to go talk to a counselor at my university about it. It helps you get things in perspective.
I'm not saying your situation is as severe as mine and I'm pretty sure it's not. Just be honest with yourself if it is and go talk to a professional about it if you feel that there's even the slightest chance it could help (DON'T fool yourself). Most college counselors are free and certified social workers or psychologists. And try to keep the lines of communication open with your parents. Discuss all this if you can. You don't want things to get unpleasant.
Again, try to keep the big picture in mind and remember that your parents are out for your best interest, whether or not you think so. If it really bothers you to be around them, then avoid them for the time being lest it provoke you to do something disrespectful/hurtful.
Good luck working it out.