I don't know what my W calls me. I just bet it isn't good. I know she doesn't call me her husband and she considered herself D'd the day she gave me papers. I too believe my W denies my existence. I believe she does it for 2 main reasons. 1) She wants to be available for other guys so there is no reason for them to even know about me and get scared away. 2) She doesn't have to deal with the ruined relationship (failure) and eliminates any sadness by not even thinking about it.
I would call you my X to let others know I am done with you and to show my availability. By not filing papers, I would be hanging on to feelings and thoughts that I might be throwing something away. That's just my perspective.
