My parents don't trust me

[TwilightFan]

And I never gave them any reason not to trust me! I've always been a good girl, a nerd, I always did all of my homework, had good grades, never went out without their permission and so on. So, now my class is organizing a party to celebrate the ending of primary school (I go to primary school). I really want to go. My parents asked me all sorts of things, like, how are we going to go to the disco and if there's gonna be any booze. So, I told them the whole truth and nothing but the truth. Seriously, I even told them there's gonna be some booze (which a teenager, who would want to drink it, surely wouldn't tell his parents about, right?), but that I won't drink it, just like a couple of my schoolfriends, and that we already arranged for us to be orange juice there. And all of my friends are gonna be there and I really, really want to go. So I promised them, that I'll call them as soon as something weird starts going on or as soon as I won't like it there anymore and that they're going to pick me up, so that they'll make sure, I'm not drunk or something. But whenever we're talking about them and I answer on their question, saying: "I don't know" (cause, I really don't know EVERY SINGLE DETAIL about this damn thing), they say: "Okay, than we just won't let you go." What the hell should I do?!

[Desuetude]

Wow, I can empathise a hell of a lot with you here. Some parents just don't like to let go and don't think you're grown up enough, they still think of you as a kid and don't give you any freedom whatsoever. They probably think they're protecting you but really they're just making your relationship with them more strained and probably more stressful.

I can only suggest you asking them to call up one of your friends parents or maybe the school so they can check what's going on. Maybe if they hear that some of the other parents are accepting of it then they'll be a little more open. I don't suggest sneaking out because they will lose even more trust in you and it really won't help anything. You need to try and explain and show them that you can be trusted but I know how hard that is especially when you've done nothing to prove otherwise. Hopefully they'll change their ways and give you more independance before it takes something big to show them that they don't know everything and what they think is right for you isn't always.

[Mortal Coil]

They don't trust you because they have standards that have been set by your previous behaviour. Believe it or not, you need to be rebellious, and show them that you can handle situations where you would have the option to drink and stuff. At first, they will become more uptight, but eventually they will loosen the reins.
Also, once you've started rebelling, you can learn to go out anyways. I don't particularly condone it, but I thought I should point out to you that what your parents say does not bind you absolutely.

[garciafidel]

Its simply that the bar of you raised and set for your parents before made them trust you a lot but now you level of trust they were having is decreasing because of the changes in you..