What to Do?

I’ve posted here before, but only a couple of times. My wife has ADD. We’ve been married for 20 years and we battled her ADD ever since. As we get older, she’s 68 and I’m 70, her ADD is getting much worse, as well as her denial, forgetfulness, inattention, lack of compassion, messy ness, etc.  I owned my consulting business before we married and she gladly came into the business and took over the accounting. Very, very often she simply cannot get herself going. Every year we have to apply for an extension on submitting our taxes because she simply won’t get the information and documents sent to our CPA. To make matters worse, she always promises to go to a counselor, but never carries through with her promises. All this, and much more, has depleted my love for her. Don’t get me wrong, I have compassion for her, but don’t know how to live with her any longer. I don’t know what to do or how to make her get help. I vowed to stay with her for “better or worse”, and I will, but we are like to separate people living in the same house. HELP!