I wanted to echo what UR said there -- it is very normal for the WAS to "try on" being nice to you or opening up to you from time to time. After that they will catch themselves and worry that you got the wrong impression and will come rushing in, so they shut down or be mean to you to make sure you know they are still gone.
I went to dinner with W and some friends at one point. She held my hand in the car on the way there and all through dinner. On the drive home, she pulled back, wouldn't make eye contact, slept on the couch and wouldn't talk to me all the next day. How's that for confusing?
It really threw me for a loop but my DB coach explained what was going on. These touch down and takeoff periods are completely normal. When they take off just let them go and pretend you didn't notice anything changed
Married 18, Together 20, Now Divorced M: 48, W: 50, D: 18, S: 16, D: 12 Bomb Dropped (EA, D): 7/13/11 Start Reconcile: 8/15/11 Bomb Dropped (EA, D): 5/1/2014 (Divorced) In a New Relationship: 3/2015