Girl cheated boys

Your query seems to be hypothetical.   However as you are a male person, there is no remidy.  Now you cannot do any thing aginst that girl except to forget her.

Forget everything and listen to your Parents and get married as per their wish with a Girl you like.

Do not get into unnecessary wrangle into Cout cases, which will drag for years on wasting your time and money for decades. Be careful in the future with whom you try to have friends and do not expect everything just because such a girl is friendly with you.

Though I am not an expert, still I advice you that Respected Advocates had said you correctly and follow their advice.

Also remember that "She lost a well-wisher (you) who really loved her, but, you only lost a traitor".