I wants divorce & my wife is not ready to give divorce

Hi there, I married before eight months. From the day one of my marriage my wife and my wife family used to fight with me as we have very less understanding between us. Gradually my wife have started doubting & blaming on me about my extra-marital affairs. she always tried to humiliated me, my parents and our reputation in society. after 7 months of my marriage, my wife went to her parent's home ; from there also she used to do doubts and all the things. Than i have decided to not to bring her back into my life as we are never going to live a happy life together. So from last 1 months she is living at her parents home. During this time she has sent different applications at Near police station against me and my whole family with fake charges. Luckily we managed everything. After than, when i asked for divorce than she refused for the same. She said she doesn't want alimony or doesn't want to file a case to court; but she will also not give divorce to me ever at any condition Now i want to move ahead in my life so, How can I get Divorce from my wife?? (NOTE: We haven't registered our marriage to any office or we don't have any marriage certificate or documents with out weddings photo which proves that we are married.) Please help me through this. Thanks.