Clarification on claiming maintenance from husband without divorce

I'm 68 yrs old lady and my husband 68 yrs old,we are married for last 34 yrs n have 2 daughters.elder one is married n younger one is serving.I was working in public sector and retired in 2009.my husband is ex defence off.taken premature retirement on med.ground before marriage n was not working so I had taken care of all the home affairs,both daughter's upbringing,education,marriage etc.He used to get scanty pension which was not enough as he is alcoholic n smoker.Now after OROP his pension is increased upto 50 k.we both were living in rented house,he torchured me mentally n driven me away from home,I'm not in good health n have no source of income.The house agreement is on his n my name.kindly advice me what should be done on my behalf,I'm willing to stay with him but he tortures me religiously,sexually n mentally.If he doesn't allow me to stay with him how to get a maintainance from him?