So sorry - tough times ahead. Biscuit and Evermore give great responses. I want to add that depression is the likely root of this. But not the sort of under the duvet version most people think of. This is the more manic type, where one tries to outrun it. I have come to hold no belief in the idea of 'lost feelings' in a 'normal' sense. If this were a leg, you'd be seeing a doctor, right!? Of course, people change, feelings change, but we all know from our own lived experiences, these tend to morph slowly, and indeed, ebb and flow. Not just die in a space of months. But, yes, this maybe 'normal' for depression, not for a healthy person who has been in a very long-term, loving, supportive and well-functioning relationship. Be wary of taking literally what your H says when he quotes his therapist - this is the version he wants to hear. Perhaps, like many a spouse on this forum, your H is a bit of a people-pleaser? A maladaptive coping method to avoid conflict. But this tends to cause of build up in the people-pleaser of unmet needs and resentment. NOT your fault (and it won't just be with you that he has stored these resentments BTW). This kind of avoidance is also a sign that a person didn't really develop healthy set of coping strategies. Hence the inability to swim with the riptide of midlife. Better to get airlifted out says the crisis person 'see where I land. I imagine it will be nice tropical island, where I will live happily ever after'. This is pretty much his thinking at the moment. He is trying to save himself, using an extreme version of avoidance. Sadly, he is not really able to think of others, only his own survival. Yes, he is selfish and blinkered and yes, there is likely someone cheer-leading him on. Again, sorry.
Time to deploy your Rockness towards yourself. It bodes well for you, you are clearly the emotionally strong one in the outfit. Consider confiding in a couple of close people if you haven't already, ideally non-mutual friends, get some IC, punctuate your week with at least one thing that gets you out of the house doing something absorbing (evening class, pilates, etc). Start to secure your finances too. Most of us here will testify, the crisis person does things we never thought our spouse would do. Practical steps towards this now will help you moving forward. ((((((hugs))))) KD