Hi Bright, Just so you know, your H is acting just like my W with the FB. This is a woman who can't find time to answer texts from her daughters but she still finds time to post the weirdest stuff on FB...every day. She posted vids of how to fend off a rapist recently! How weird is that?
With my W I'm certain she's trying to show and feel that she is somehow part of a "group", that she is part of the "in" crowd and has friends. That is so important to her but she has such poor R skills (even when it's just friendships) she has a very hard time making and keeping friends. Part of the reason she is D'ing me is the attention she is getting because of it (she actually told me this back when she filed!). She always would talk about how she felt "invisible" to others, since she has left she is getting lots of attention from the women she works with. I think many MLCers are like this, feeling like teenagers who desperately want to be "popular".
If I were you I would do what I have been doing. I just don't bother even looking at what W is posting. I get notified by email when she posts but I NEVER bother to look. Nothing good IMO can come from seeing what she's up to. I really think it helps me stay detached and might be something for you to think about!