Why everybody always think they know me? Like they are mediums, as they know what I think or want or have been through... but I only show what I want them to see.

No you don’t know me! No one does. And i would not be saying neither that I do know you.
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Eveytime I am nice it’s not me hiding my emotions it’s me dealing with the devil in you.

What should I do ? Insult you and telling you I am hurt and that I hate you for what you did to me ?

This is not the person I want to be or Even is. You don’t know me!

If I react well when you rejected me it’s because at least your have been sincere and respectful and I respect that enough not to get angry or even sad.

If I get angry or sad who that will help: you surely to see that your actions have effect on other: but you alredy know that when you did. You knew it will hurt me anyway.

If you did it you have your reasons and I respect it!