Fraud in a relationship by b.f

I have a bf since 2015 who promised me he ll marry me by 2018 since last september,2016 his attitude towards me changed a lot n he started ignoring me n told me once he might not marry me if his parents ll not agree for our marriage. I creid a lot n said we ll try our best to convenc ur father if he ll say no thn we can think about it but atleast we should try our best it happened in the month of october 2016 and he agreed we continued to this relationship n we meet every month and have physical relationship since we met n i accepted his proposal . He always told me after marriage wt we ll do n what not also planned kids with me . Everything was going on smoothly one day i asked him about his father that is he talking about ur marriage at home if yes lets talk to him about us. He said this year we cnt tk abt it as i m not able to earn well so lets wait till 2018. Now suddenly last month in March 2017 some1 told me my bf got engaged in sept,2016 n getting married in May 2017 thats next month . I called him n asked him about it he got angry n said y i ll hide all this . I was ok till the time i got proof tht yes he got engaged in september without even telling me. Now he is telling me he is getting married bcz his parents r forcing him n blackmailing him tht thy ll die if he ll say no so he is giving me a promise he ll marry me after 6 months of his marriage. I said no you cant marry twice so i want u to marry me this month. Now he said he said he dpoke to a lawyer for our court marriage n he ll marry me in court by next month before he gets married forcefully. Now i check some how i got to know he lied abt the marriag application etc What can i do about it now who can help me in this case as he is still telling me he ll marry me when he is already engaged to sm1 else he is telling me after 6 months we can marry .. kindly suggest