I don't want to mind-read with Mr. A. BUT, I have a hard time asking him questions directly, especially when I'm worried that my questioning will push him away.
I would bet Mr. A knows this and is using this to his advantage.
I don't mean to sound pessimistic but I just get the feeling he's using you as a placeholder right now. You are familiar to him and currently a sure thing until something else comes along. He hasn't voiced at all to you what his intentions are, that he is considering rekindling the marriage relationship, making no long term or even short term plans. It just doesn't seem stable to me. He's got you basically walking on eggshells and second guessing everything you do. Not a good situation for you in my point of view.
