Contradiction

I write things that no one will ever see,
But I write them as if someone is reading them.
I say I don't like people,
But I love them as well.
I paint my nails,
Then I pick it off.
I don't like cheese,
But I only ever order margarita pizza.
I feel like know a lot,
But then I feel I know nothing at all.
One thing I do know is that I am a contradiction.
And maybe everyone is,
But then again I am not entirely sure,
I might just be getting confused again.