False promises to marriage by girl and used for personal benefit

My girlfriend not refuse to marriage promise 9 month and now giving reasons she has no feeling. Actual story: She had a x boyfriend and to get his attention she told me dt she likes me and started loving me. She told me to ask at my home which I did, dn talked about getting married, have children, about honeymoon etc stuff. I also asked for sex and she had no issues with it, she called me at her place when her house used to be empty. I changed myself and did all the adjustment to keep her happy and also used to spend money on her willing cos she used to ask me for things. After her birthday she started ignoring me, when I came to know about she is asking her x to come back and got me just to get attention of him and send our kissing pics to him i got mad and angry, I this angrer I started to force her to get married which she promised or have sex which we used to. Give 100 of calls cos she ignores me. I said will tell her parents what she did if she refuses. Now she is saying to file a police complain on me for harrasing her and blackmailing her, forcing her for sex and marrage. I was loyal to her and did all possible things to keep her happy, I started forcing her cos I was in anger dt she is cheating on me.