Need advice on divorce

Hello. I am a 29 yr old hindu male living in NCR. I married a christian female in saket court under special marriage act. I made a wrong decision as she was about 6 years older than me. later after marriage we had issues and started living a troubled life mostly away from eachother. we do not have children as i was never sure to make babies. I had asked her to hold off the marriage before we got married but she emotionally threatened me that should hurt herself if i do so. so i took back my words. Its been 2 and half years since i confronted her and asked her for divorce. she refused and i left home. i have been living alone since than. we have no contact. no phone calls. No visits. No common friends. she is living her own life working as a deputy manager somewhere and i am living my own. I want to move on in my life as my age is 29 now and soon ill have no time at all. Everytime i call her to ask for divorce. she says she will never give me divorce and thats all she says. she never calls me. never spies on me to see if i have someone in my life. i even told her once that i have remarried just to see her reaction. and there was nothing. she never tried to find out if i was telling the truth or not. she has no interest whatsoever in me anymore but for no reason she keeps me hanging in this marriage legally. i am hopeless and fear that my life is coming to a harsh end. i have never mistreated her. never raised even my voice to her. i even gave her all my household stuff and myself i have been living in worst situation. i had everything in my house that one needs for a comfortable living. and it is ok. i dont want all that back. but atleast she can now after so mang years give divorce. which is actually positive for both of us. she can marry and have children after this. i can do so too. buf she never agrees to divorce. she never ill treated me either. i dont know on what grounds i can get a divorce. someone please answer me and tell me my options. I hopes of a miracle advice