Two things:

"real life" is the illusion of existance, the dream of death, the unreal reality below the higher states of being.

"acts fake" only to those who are also acting fake, be it to themselves prompted by ego and a self serving biased desire to "be" something.

As I see it, no one acts fake because everyone wants to truly show you what they are. That is however on an unconscious level of understanding. People want to tell the truth even when they are trying to deliberatly lie. So says the study of such things.

You therefore would have to stop looking to see people from the biased perspective of yourself and become the nobody to see past the "real life" of the illsuionary existance dream of death to see what people are really showing you when they "act fake".