I'm new here so I don't think I can offer you much but empathy...
My H will do the same - talk about something future related one minute (like a concert in a few months we both want to see) and then the next minute I will be the enemy again that is ruining his life.
Today I've been reading a lot on the MLC forum section - and this type of thing seems indicative of one. Your H is perhaps past the standard MLC age, but maybe it would help you to take a look over there and see if anything rings a bell?
I can definitely feel how the thought of being on your own after all this time can be terrifying. I feel it too. I haven't been married nearly as long as you have, but I've never been on my own - I went straight from my parents house to marriage. I hope it doesn't come to that - but if it does, you'll be okay. For now, just breathe.
Me: 31 H: 37 T: 10 M: 9 BD: 2012 H draws up papers: Oct. 2014 H files: Oct. 2015 D final: was Feb. 10, now postponed b/c I hired L. Currently: wondering if it's kinder just to let him go. So confused.