Im finally admitting something, please dont judge
The one thing you will never do, is lie to yourself, although you may talk yourself into believing things.
But, you lie to other's because you think you don't have their attention, or approval in a big way.
Understanding the reasons why you lie in the first place is a start. But, putting to the test, the practice of telling the truth, is what will end it for you, is when you see that those you tell it to actually are listening to you and it is good enough what you have to say.
You need to realize that you can't be perfect, as you think everyone else is, and no one is perfect.
You have to realize that you have to find a way to be satisfied with what you say. And to start telling yourself, that what you say is good enough. And some will accept it and other's won't. But, you need to realize too, that it is the same as when you lie. The only difference is, that other's will accept you in a much better light then they have in the past.
get some help before you lie about the wrong thing.
I actually think that professional help is the only thing that could help you. Please go for help so that you can stop this now and so it won't effect the rest of your life.
This isn't the worst thing in the world sweetie. Many people do it. Just go ahead and get help. You are unhappy with yourself for some reason. That is why you probably started lying to begin with. It is too bad that no one got help for you when you were a child.