Hi, Gail--
I do wish I could give you some great advice on defeating the isolation, but sadly, I think this is part of the bargain when your Loved One develops Alzheimers or Parkinsons or Lewy Body Disease.
It just goes with the territory. I hope I'm giving credit where it's due, but I THINK it was Scarlett here who coined the term "Midow"--we're caught in an extra dimension, so to speak, where we are married but not to the same husbands we wed. We are in the half-way world of being married but almost widowed, but not quite fully in either world.
Others have shared some ideas. I think what's helping me cope best is sharing here at TP, reading through older threads to learn more about these strange/odd new behaviors in our lives (so I'm not feeling quite so frightened as before).
I find, myself, that friends and family don't really understand or even see what's going on with my husband. Like your experience, he simply avoids the contact. Unless the family member/friend is exceptionally perceptive (few are), this is not recognized even as avoidance, let alone dementia.
Even the doctors can be "spoofed" by the miraculous elevation of intellect that oddly occurs during doctor's visits. Others have mentioned this one, but it does rather leave you feeling strangely alone, doesn't it?
Let me tell you what helps me & maybe some of it will help you.
1. Get a dog or cat. Great comfort here.
2. Read more. Think of books you've always wanted to read, but never had the time to. Get a library card and a Kindle.
3. Write in a journal. Everything. Every day. Take your own life out and examine it fully. See where you need to grow as a person, not just how you can be a "better carer." Look at yourself with fresh eyes. It will actually help you understand not only your situation, but your husband better. I find it helps take away a lot of confusion in my overall life and alleviates the feelings of lonliness/isolation. It's strange, but having your own self for a best friend is strangely comforting. Or maybe I'm just deluding myself : ) Truly, it works for me, maybe it will help you some.
4. Think about ways to help you structure your day, to take some of the isolation away. Strangely, my trips to the grocery store are a welcome outlet, getting to get out a bit (though I get about 5 phone calls from my OH during my 30 minute outing). I only go about once a week, but it's a pleasant break, when looked at that way (rather than a chore to be done).
5. Make friends with some neighbors. I have some elderly neighbors (relative to my own age) & I'll occasionally call them to check up on them & visit a bit by phone. It helps us both feel less "alone."
6. Sometimes, just getting away from your own loneliness is simply a matter of helping someone else. This sounds really, really silly, I'm sure, but I enjoy writing reviews at various sites on the internet, just to help others like I've been helped (things like nutritional supplements, etc.). I occasionally get "feedback" on these & enjoy "visiting" with others this way.
7. When you feel really, really, REALLY filled with loneliness and self-pity, go read the collected thread from the Widowed Carers. Truly, it will give you a perspective you've never considered. I've found that quite helpful and illuminating, myself.
8. Remember your OH is still here with you; I've found that sometimes, by "talking up" to my husband (being encouraging, telling him he looks especially handsome today, etc.) he actually responds by elevating his actions, even if only for the briefest of times. But it makes me feel better and encourages me in this challenging journey.
Wishing you the best and a bit of hope for you, that you can find a path that will help you help yourself.
No denying this is a very hard journey, but you are where you are, whether you want to be there or not. Same for Hubby. Never forget that he would never choose this for you or himself.
Hugs and hope for your happiness and comfort,
Willow Tree
P.S. One more point: never feel guilty or feel "less" for resenting this disease and the position it has put you both in. It's very tough, but you're tougher : )