The level of "commitment" that he is offering you is no different than you were getting for 20 years, and that you said wasn't enough for you anymore. It was at that point in this circus that I bought my ticket and started following your sitch.
It seems to me that you ARE willing to go back to that, and in fact are DESPERATE for it. So why don't you just agree to it, and stop driving each other insane?
From the outside looking in, your little "dance" you two do seems dysfunctional, but maybe it worked . . . for BOTH of you?
You SAY you want more, but your ACTIONS of the past month scream otherwise.