As a man, I can't help but feel for your 82-year old husband. Does he know you've fallen out of love with him? How long has he known this? Was there anything he could have done to save your marriage the way it once must have been, or you would not have fallen in love with him in the first place (I'm assuming your marriage was not arranged or something of that sort).
If you left him, he would be alone with no one to care for him, no one to keep him company, etc., and he would likely die alone. What a sad state to be in. The only way I could describe it would be "hell on earth". To avoid that pain, he's doing what he can to keep you with him, rightly or wrongly. It's easy to see someone who's 82 as a spent human being... but we're all going to be there ourselves eventually. Sooner than we realize!
Like Abraham Lincoln once said, "You can't believe everything you read on the Internet."