Am I too sinful?

I don't think I will go to heaven. I can't be childlike. Gone were the days I treated everybody as friends. But am I really sinful? Is it sinful to choose your friends? Is it sinful to know what you want? Is it sinful to set standards for yourself?

All the retreats tell us, "Know yourself before anybody else."
All our parents tell us, "Just be yourself."
All the philanthropists tell us, "It starts with you."

They all say the same thing.
Except for the next part.

Goodluck.