What if a girl files an FIR for false case

Give me legal advice from best advocates here. One of my friend having some problems with her friend or girl friend you can say. I tell in starting they both meet in the office boy is her senior and her newly join same office ....both are planned one short trip with boy... School friends with her....in school friend 2 members are there ....they booked 2rooms one for girls and other 1 rooms for boy....all trip.was good till end . Now the problems will be stated with office friends.. a girl like to boy in last trip so she's approaching to boy for friendship as a boyfriend type and boy agree her request and clearly tell her that we are continui as a bf gf only not more then that....but now a problem is that the girl now totally serious love with a boy in a months and she's mentally not in control who to handle the herself. So the girl blackmailing a boy on same office and said meet after office .she doing this only when a boy totally irritating with her.so a girl totally blackmailing