Why are people so fake?

It's just so goddamn frustrating to me. For instance, my sister went out today for the going away party of someone she CANNOT FUCKING STAND and wrote this deep and personal "i love you it sucks that you're leaving" card and has recently uploaded a story to Snapchat saying "goodbye love you!!"

Why, for the love of God, can people not just say "I refuse to deal with you, leave me alone. Like permanently."
How do fake people live with themselves? And why do you openly choose to be so fake?

Writer's note:
I am not saying that all people are like this. In my experience, it seems to be more common in women though.
Why are people so fake?
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