cheated on a relationship that was supposed to lead to a marriage

I have introduced by a married woman of the same age through a social media platform. At the start, it was just a friendship. but going forward, she started loving me since I supported her in crucial times Like she experienced sexual harassment from his father in law. husband was not interested to hear or doing anything about that. i helped her to solve the issue. From that point, she was mad about my relationship. I warned her don't be addicted to me, and that you need to stand independently. but she was not agreed and she went into a depression stage and started crying all night. I can't resist or deny her love. I started loving her and protecting her. I gave her everything, financial support, job by finding through consultancies and Olx, she was nothing we she met me. i helped her to earn respect and everything. Finally she cheated me for her new friends at work. nncan I file a legal case against her for a fake marriage promise + financial cheating + defamation case?