As teenagers go, your w is fickle about relationships right now, i.e., bouncing from one to the other. Guess she wasn't up for the date last night. The removal of the OM's photo from facebook is a telling story in and of itself...that one is history.
Enjoy the movie today. It looks like it's a good one for all ages. Where are you going on the field trip? I think it's wonderful that you are going w/your daughter.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.