I am already married but a girl forcing me for marriage with me.

I am 29 years old and i am married i have 2 child Few month ago meet a girl in Facebook Messenger we are become good friends and suddenly i lost my job and i am facing financial problems and i was plan for go another city for find good job all the problem i shared with her she also say i also want to go another city for job my friends also working but i can't go because i am afraid for traveling alone are you going then please take me with you. She said just for travel please help after reach the city i will call my friends i was ready for help her Finally we both reach the city after reach she started calling but no one response she was in big problem because of unknown city and she again ask for help she said i will go just i want stay with you some day when i find a job i will go. I am also emotional because alone girl where go in unknown city then i take her in my room she not find job and takin extra time again & again. Now i want to go home she was started blackmailing me for marriage her and stay forever here.