How do I distance myself from fake coworkers and stay less personal at work?

Is it too late to get away from them? And how do you not be too personal at work especially knowing you woke among fakes , I just found out my so called close coworker been talking smack about me behind my back and I been pretty close to her how do I depart from her?

How do I distance myself from fake coworkers and stay less personal at work?
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