Time is your friend; but you have to continually find the strength and patience. That's the hard part.
Your husband calling you his "ex" may be a way for him to deal with his own confusion, especially if he thinks you are taking steps such as visiting a lawyer.
My W likes to push me away with her words, but when she suspected I might have been out with another woman she approached me about it (I wasn't, but didn't let HER know that).
The other night when I mentioned to her that I hadn't filed for divorce...yet, she seemed to get defensive and said "What do you mean, yet?" Almost like she got scared thinking "Uh oh. He's calling my bluff! What am I going to do now?!?"
I am working on not reading her mind, hard to do sometimes, but it is a pointless exercise to try to figure out what they are thinking.
Your husband hasn't filed or mentioned divorce recently, so that is a positive thing to build on.
WAW Using God Me-43 W-40 M-14 S-11 S-9 D-7 EABomb 5/09 Separated 12/09