There isn't an A in my sitch, but I can relate to your #1 and #3.
Is H reconnected to me emotionally? Does he love me? Or is he acting as if because he made a choice that staying is the Right Thing To Do?
I basically decided that it doesn't matter. I mean, it does matter, but I shouldn't let the answer change my behavior.
In a long term relationship, I have to accept that there will be rough patches. Times where people are acting out of principle more than passion.
My job is to be responsible for my emotional health and happiness, and to be the best spouse I can be.
Dwelling on anything else is unproductive.
Just my two cents. Worth what you paid for them. ;-)
Me: 44 H: 44 Kids: 20, 16, 16, and 10 Together/Married: 22 years H announced he was emotionally detached and considering D: 4/4/16 H announced he is going to try to stay and reconnect: 5/1/16