This is such an awesome and inspiring post, Yail. Thank you.
How well I understand the difficulty of trying to integrate these two seemingly mutually exclusive impulses: (1) to continue to love W and to stand by your commitment to her; and (2) to love so much that you graciously accept her choice to walk away to pursue her joy as she views it.
Your own choice to abide by your vow to accept her as she is, even as she goes through her journey, is beautiful ... and painful. Regardless of what happens, I trust the strength evidenced by this choice will get you through the pain,