Can I jump in? I almost wrote about my xh the other day when I posted and then deleted it all. Lucky you. What I'll say now though is that nearly 20 years later after I was the WAS he still cannot acknowledge my existance. Just last week he and his current W were waiting for traffic (me) but can't even wave. I am 'sponsor' for xsil's D. When she got married they couldn't invite me to the wedding because then xh would not attend. The rest of the family is friendly when I see them, even have come to see the horses. When I finally decided to leave that M I didn't walk, I ran. The man still scares me, but rumor it his current M has problems because his W thinks xh has me on a pedastal. Crazy!!! He is a bitter man. I have much of that part of my life blocked from memory.
You've got some options. Do you like it or want your xw to stay in contact with you? over time it would eventually fade anyway depending on your actions.
You can stay friendly with some occasional light responses. You can also be direct and ask her what she expects from you.
Better yet, be forward and ask her over for a romantic evening and cook up one your famous meals. That ought to scare her back into hiding. And I don't mean your cooking.
Keep your bubble in the middle.
Live your life while you are still living. Riding the trail less traveled.