Multiple sides.

It's funny how you think you know someone, but in the end you clearly don't. At that point, you learn that people have more than the one side they have been showing to you this whole time you've known each other. You've finally stop being oblivious of his/ her multiple sides of character.

You need a shoking event or a big change to see better their true colors. When you first meet someone, it is imminent that they treat you right and make kind gestures. But along the way, you get familiar with everything else, especially the things that were hidden at the beggining.

People can be mean, cruel and self-centered in a flash. If something happens that they don't like at all, the looming hate and revenge can destroy everything you have worked for.

So be aware of reactions. If you really stick to your desicion and believe that you truly know yourself, then you have nothing to be afraid of.