Andrew, I'm glad I helped some. Completely normal to feel the way you feel. Tomorrow you'll be fine, the next day who knows. It's not a fun part of life what we're dealing with, but it could always be worse...
Your W's confusing behavior is part of her own confusion. Kaffe Diem once told me it was called "touch and go." They get closer to you; you respond positively; they pull away, and the cycle goes on and on. I think she wants to make sure she "still has you" while she figures things out. Yes, very selfish, but all WAS's do it.
I would accept some but not all invites. Get busy with your own activities, and if you are free, join her. If you're not, say no. If you're not busy but are saying yes all the time, you'll have to sneak in an excuse to not join her. My coach said, your H fell for you bc you were interesting, you were a mystery, a challenge. Then, you became his personal assistant, housekeeper, massage therapist, caretaker, and he treated you like dirt. That role must be over. That's what I'm telling you. Quit the roles that are hurting your R. Be the man she feel in love with. I know, easier said than done, but GALing will help. You're very athletic; any exercise groups in your area that you could join?