Please help, i don't know what to do

I literally do not know where to start... well i'm 16, about to do my GCSE's and my life is a complete misery.
I lie about everything to everybody, my parents, my siblings, my teachers even my best friends. But the thing is they don't know i'm lying so now I have to pretend that everything i've said is true and it's like leading 13 different lives with 7 different personalities and I can't keep up anymore!

I've tried telling my parents but they simply say "don't self diagnose" or "your just on your period, it'll pass" or "lets talk about it tomorrow" and obviously tomorrow is, well, always tomorrow and never today.

I don't want to loose these people though because they mean so so so much to me and I care so much about them, but some of the lies i've told are huge! But things are getting out of control now, i'm starting to do very foolish things and I don't want to do something i'll regret. I'm certain that the heart of my misery is all these bloody lies and I just don't know what to do... I don't even know if i am a "complusive lier" but I don't know what else to do...

Dear Sancon,
I want to start by saying to you Well Done. Why? Because you are a good person. You're a good person because you clearly consider those around you to be important enough that you will go to strangers, just so you can keep your friends and family happy.

Second of all I want to remind you what family is. Family is when people love each other, no matter what. I can promise you right now that yours will be understanding.

I don't think you're a compulsive liar. A compulsive liar is somebody who lies because they CHOOSE to lie. I don't think you're choosing to lie, I think you feel the NEED to lie. The need isn't because you're a bad person, but because you feel that your friends and family will not accept you for who you really are and so you make yourself sound more dare-devilling, more funny, more popular- whatever it may be. You are doing it for these people when you do not need to. They will love and accept you for open arms no matter your grades or lovelife. They love you.

You should also know that people tell lies. A lot. Everyone does. I think you should take a step back and think "Well I lied when I said I got an A*: maybe my friend did too". I'm not suggesting you start distrusting everybody, but I'm saying don't compare yourself to a perfect person who might not even exist.
Remember- Make good choices!

I applaud you for opening up at 16, I wish I had. I am 26 and still suffering...this web site has been my first ray of hope. Now that I know I am not alone in this I feel that I can get better and talk about my issues. Def, look into talking to someone, have faith that you can stop this. Your tough already