MKB, I am really sorry to hear about your grandfather and about how hurt you've been feeling.
I think you're right in that you need to drop the rope and have no expectations. Ideally, you'd be so detached that you wouldn't care who he was contacting. It is annoying though that he let down your Ds. Did they mind him not coming for them?
It does sound as if he tries to provoke you into reacting and succeeds. It would be really interesting to see how he'd respond if you didn't react. At first, he might up the ante and then give up trying to upset you. How did you even get onto the topic of XW1?
You have a lot going on at the moment so best just to look after yourself for now. As you say, you can 180 later, though putting yourself first might be a 180 in itself.
Me: 51 H: 52 T: 23 yrs M: 19 yrs S18, D16, S14 (special needs) PA: 2003/2004 Piecing: 2004 on Suspect H had EA: 8/2012-12/2012