Funny - I'm not sure I ever really internalized the ILYBNILWY. Not sure I could really make sense of it.
I KNEW she loved me. This seemed to me something to say to try to justify her feelings and actions; she had been distancing herself for awhile, was very confused.
My take-away was that her needs weren't being met, she was being sucked dry by the demands of our life, she wasn't happy, and was very confused about our life.
What got me was: "I can't stand this relationship." Now, THAT I internalized.
