Fraudulent behavior by girlfriend ruined my life

I met a girl in 2013. From then we started our relationship. We have been into sexual relationship too as we decided to marry. I came to know one day through her that she lost her virginity by a person who forced her into sex. From then I was mentally disturbed as I wasn't able to accept that reality. I was too depressed and it lead me to attack of bipolar disorder too. After recovering she told me that she no longer has love feelings towards me in 2017. From then I was sincerely waiting for her to accept my love as I lost my virginity to her and wanted to be faithful and loyal to her. In December 2020, she got married and 2 days back I found that she married the person whom she mentioned to me as the one who forced into her sex and took away her virginity. I was completely heartbroken by her betrayal because the reason she told me for leaving is that I broke her trust and exposed to my parent about her incident where she was forced into sex. But its she who made me to believe false statements and which destroyed my health which resulted in losing my ambition and my career. Now, I need legal advice for filing a case against her. I don't know whether a law is existing at all for punishing these kind of people who with fraudulent behavior maintaining dual relationship are destroying another person who love them the most in this world.