Mrs Hess, I feel for you, and I can see the temptation. It's horrible feeling housebound - so very demoralising. It's a viscious circle too - the less you do the more miserable and unsociable you get, so you go out even less and lose that bit more fitness, and so on and so on.
I've recently been through a patch of giving up on walking anywhere, but got headed off at the pass by a surgeon who very kindly told me to do pilates seriously and properly for three months before looking at the problem again. It took me a few days to come to terms with the notion that it might be in my own power to fix things, but I made a choice to do as I was told!
Long story short, I got a well qualified pilates teacher to come to my home - no more excuse of not being able to get to class, and the cost alone means I have to take it seriously. A friend then set me up a reward chart for doing my exercises - I get smiley face stickers, and my reward when I've done enough sessions is a G&T in the afternoon at a posh hotel. Motivation!
Things are improving dramatically for me now. I accept now that there was a significant psychological component to how much pain I was feeling - I had become very very low about not being able to walk, and found it awfully hard to suspend my disbelief and actually do the excercises. Now that I'm in the habit I realise that I do feel better on the days when I have stretched and so on.
Can you find some way of figuring out what will motivate you enough to rally your resources one more time? For me it was the one-to-one help with the excercise, and a G&T with a mate. I hope you figure something out to make it easier to get there. Good luck.