This situation reminds me of how I interact with my W sometimes. You see, after we've "been in each other's pockets" for a few days I can sense her wanting some space. She won't really tell me, I think it's because she's afraid it will hurt my feelings, but I can tell.
So, I was just wondering whether your W is operating with the same the state of mind where she needs some space, but doesn't want to tell you 'cuz she's afraid it might hurt your feelings? Thus, she's begins to feel resentful when you "push" to do more together.
It's unfortunate how she handled it, but we both know how she's not one to typically say how she really feels. Right?