My girlfriend keeps lying about meeting other guys—what should I do?

Im in relationship with a girl, once she was with her female friend in beach club and she told me she is home.

and once we have been fighting fir 4 days and during the 4 days she accepted to see a guy for lunch.

and then later she met a guy to do jet ski

and all of this been told me by her female friends meanwhile she swore and cry to me that she did not

later on she admit it that she did and she always apologise and cry over it and then she do the same thing again

what should i do guys?

My girlfriend keeps lying about meeting other guys—what should I do?
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