Wife was cheating on me.

My wife was cheating on me. she was having a relationship with her college before our marriage, she never told me about this but after few days of our marriage ( it was an arrange marriage) at one night i found out that she was talking to someone via phone. i asked her that with whom she was talking, she simply said i was talking to a friend. but later one i found out the truth. i confront her and ask her, she lied and told me he is her good friend. due to some doubt i installed a software in her phone, which give me access to her massages and call records via internet. from that massages i came to know that they were involved in physical relationship before our marriage and after marriage she is doing the same. we had fights due to this and one day without telling me she went to her parent house and never came back (April- 2016), she was pregnant at that time, later on August 2016 she gave birth to a baby boy, she don't even informed me about this, she called her boyfriend and told him about the baby boy (i came to know from massage and call details). after all this we never talk to each other. we are not in touch from April 2016 after one year on April 2017 i filed a case for divorce. and talk to her Advocate too that i don't wanna be with anymore. as she has cheated on me. but they are demanding so much money and not giving me any suitable answer, i came from an normal family we don't have that much money to give her. i am having all her call details and chat massages records in that software. i don't wanna be with her because after my warnings and conversation she was in relationship with that guy. i don't trust her now. i am very depressed and because of this i loosed my job too. please help me with this situation. court procedure is taking too long. some times i should suicide. :'(