How can i get my personal space?

I'm 16, so I obviously still live with my parents.

My biggest problem is that I can't have my own space. They enter my room without knocking or letting me know they're coming in. Or they come in and stand behind me and read over my shoulder while I'm...

on my computer. And it freaks me out when people stand over my shoulder. I get all nervous and stuff. I don't know why. I've told them MANY times that I need my space. I've told them that my room is where I should be able to have my space. I should be able to feel comfortable. I shouldn't feel like someone's going to walk in at any moment. It's so bad I've had to stop changing my clothes in my room because they might walk in. And usually, they just walk in and look around and touch stuff. And I HATE when ANYONE touches my stuff. They aren't even in my room for any specific reason.

If I tell them to stay out they're like, Why? Are you hiding something? Are you doing something you shouldn't be doing? If you weren't then you wouldn't have a problem with us being in there. I'm a good kid. I have nothing to hide from them and I don't do things I shouldn't be doing. But that doesn't mean I want them in my room all the time. And if I tell them to get out they stare at me like I'm over reacting about it and say, Jeez.. I can't even come in to talk to you. No. They can't. It bothers me. I hate when people invade my personal space. And my room is my personal space. Sometimes if I don't lock the door, my mom will just walk into the bathroom while I'm in there. It's getting REALLY old. And they ALWAYS gave my brother his space. They only went in his room if they needed to and knocked before they went in.

How can I get them to leave me alone? I can't deal with this. I have no privacy at all. And don't say Talk to them. because I've tried. It doesn't work.

Sorry it's so long. And sorry if I repeated myself a lot. I tend to do that.

Yeah, ok, I know how you feel, a few months ago my parents won't back off. My mom would complain I hid in my room too... the solutions I came up with are as follows;

1. I'd come out at random times (mostly to eat) point out clearly that I've left my room, then continue to annoy her, without making it obvious that's what I'm doing. Example: She'll be watching tv, I'll sit in front of it, and ask her about her day. she asks me to leave, I'll reply, I'm sorry I'm annoying you, but I was just wondering... (Finally she's gets almost pissed off, so I return to my room)

or

2. I'd just sit somewhere else, if you have a laptop, and wireless, this is a great idea, hide someone they won't suspect, I choose outside. (They never thought I'd leave my room!) It works for a while, then they discover your new place, so you've got to change it again.

Some parents don't listen, mine usually don't, I hope this does something for yours! (Try not to scream for some reason they can't listen to that -.- )

I'm sorry dude. That sucks. If it makes you feel any better I share a room with my mom. So I know how you feel. You're best bet is to devise a plan. Here was my plan when I turned 16.
-get my license
-get a job
-SAVE MONEY
-buy a car (in MY name!)
-move out when I'm 18.

So you're probably guna have to wait it out until you're 18. But the only way you can escape successfully when you're 18 is if you start your plan of action now. Don't tell them you're planning on moving out. Don't say anything about the plan. If you get you're license you'll be able to drive freely legally. And once you get a job and save all you're money you can buy a car and get out of that darn house of yours. You can live somewhere else. Far far away. And what's even better is that their opinion wont matter because you'll be 18 and its legal for you to leave your house. You'll be able to do whatever you want without your parents permission.