Can you tell her what you want... to feel close to her in the evenings and to have a life without the emotional roller coaster? Can you tell her that you are afraid of losing her? Can you tell her how angry you feel knowing you can't help her? Are there some things you can do for yourself to cure the loneliness... ie. join a club, sporting or hobby activity, something that would get you out of the house at least once a week? So what if she stays home alone? Perhaps, by removing yourself from the house when she starts to get emotional might be a good start. Her moods are not your problem.