It seems that W is starting to thaw despite some "coldness" in her voice. You are doing a good job of DBing and not asking W too many questions.
As for the invites, the best path is to go with the flow with W and accept her invites. Then showcase the best F in the best possible light which means new clothes, groomed, upbeat attitude, and make light hearted comments/jokes. We're all drawn to people who exude and radiate positiveness, right?
Since things are progressing nicely, I'd hold off on that exchange server thing. Otherwise you'd poke at the hornet's nest with this matter.
Keep asking yourself this question: Will this action/words bring me closer to the goal?
That has been the mainstay in my DBing skills whether it is with Ms. Wonka, my new hot girl, friends, and the workplace.
