True to form, I just talked to her on the phone. She is cool and calm, the spark in her voice is not there.
It was a 2 minute call, just asked her for a phone number...I got out of the call quickly, as per my instructions from my DB coach ("when she is distant, end the interaction ASAP").
Totally 'chameleon effect' (see 2 posts back). I'm glad I now understand what that is. I won't take it personally.
We must have had a really good time this weekend, for her to be so distant!