Yes, I guess your W's LL is not gifts if she could leave a pearl and diamond necklace in the box for a year!
You've been doing this for so long - I think it's time to take a few days and just forget about pleasing or figuring out the W. I had to do that every so often just to clear my head.
Do you journal at all. I found that a lot of insights came to me as I did this, things I didn't even notice as they were happening. It also helped to get all those thoughts out of my head. It seemed I could let them go more easily once they were on paper. It is very calming for me, and I was never comfortable writing my thoughts and feelings down previously.
Just keep trying to treat your W as a good friend, regardless of the response. At least you'll feel great about yourself.