Although I am not sure of the religious state of mind about our world, but I think I can safely say about 70% of the world population don't think that they need a confession, most just think that there is nothing wrong with themselves.
But in any case you would like to talk to the big man upstairs, you can always go to i4giveu.com and leave your eternal shame on the internet with the almightly.
Yes! it is eternal whether you are forgiven or not.
Can we just write our confession on a piece of paper and burn it? (Link) via Techcrunch.