I don't know. They can be stand off like that and act like they are in control when they are on the verge. Aquas are like that some times.
I say don't put him into and ultimatum, because he will lash out/over react. They do that when faced with ultimatums. They don't deal with ultimatums well; even when it's for their better.
Just cut off the sex, and just hangout strictly as friends. Let him know that you are not comfortable with the fwb thing. Tell him you want a relationship and respect of being a spouse.
And they are wishy washy and sometimes selfish, but I like 'em. Good luck though.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.