Cheating

Dear Advocates. My problem is very critical. Before some time my gf asked me for money to start her business . After that I have her so many time money for different purposes. Like her room rent , daily expense , office expense . I have her more than 1lakh rs. When I asked him for return my money she is not responding . She gave me so many dates to return my money but she didn't give. One more thing .she was with relation back to back with 2 guys . They were married already . She live 1 year with first guy. And 3 years for another guy. Now she is in relationship with a married men also . I am very upset . And mentally tortured by her ..