Knowledge on best way to proceed for Divorce

I am a man, married for just over a year ago. I live and work overseas on contractual job for 6 months and return home for 2 months, and cycle continues. Wife's behavior is not good and not understanding. She is demanding Speaks/does ill things behind our back and shares everything to her family, making me look bad. She is manipulative. She had forced sex with me often,which i made clear I cant. To this, she spoke ill to me about it and gets upset. Father threaten once to take her away,creating a drama at our place. Wife threatened me in public also that she left home and to drop her to her parents. She has suicidal instincts and has several times in the past spoke about doing it and once attempted it (i have proofs and recordings).No one knows as I haven't told anyone about it. From my side, I feel we have irreconcilable differences although she claims she loves me a lot and sometime it does make me feel she is right form her actions. But It gives me more stress and I feel tortured mentally. Since marriage, she has been diagnosed and we have been treating (I paid for expenses) for Fits/ seizures in addition to thyroid, back pain, Women heals issue and other small ailments very often. She is not respective towards me or family and back answers to family sometimes. What ground can I file this divorce as I am sure the Spouse and her family will agree to mutual divorce. Fyi- She is working individual and does not do house hold chores,except cooking 2 times. Please help