Married in 2016 stayed together for 5 months want divorce now

Sir,I got married 2016 June 4th from. The day I saw her in match i loved so much but, she never loved me.inoffice, social gathering every where go she's behaving very bad. One day I told about my past only to be crystal clear wat I am and I don't want to hide anything to her which creates problems in future.and she too told about her past and that very worst than me.she still continuing being with the same behavior. She told everyone of her family members and blaming in every time time. Unfortunately she got pregnant with that she wants to divorce and said it in writing. She left when she got 3rd month. Still now came back. In may. They apply petition against me dowry case on all my family members. She never stayed 15 days with my parents, they never asked any money. And I got threat from her mama and brother to killing me.when we when we went to ps they took the bike, which they offer me.they attacked us.am not able to tell everyone about her past personal life but they are. Pls help