Do my girlfriend act fake?

How do I deal with a fake girlfriend. I have a girlfriend that thinks she does nothing wrong. She always says when I bring up an issue that she is always wrong. I explained to her we both are wrong at times nobody is perfect. When she is around her friends or bestie, she does these fake crying and sob stories and wants to be on stage, or family she makes the relationship seem great. I'm starting to feel like this relationship is a setup, or she has a mental disorder. I'm getting to the point where I'm starting to feel depressed.
Do my girlfriend act fake?
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