It sounds as if she has lost sight of what paths to go on in her own life. Poly brings out EVERYTHING in life, perhaps her aversion to poly is to do with her own fear of taking on the challenge that is her own life... you are essentially pushing her to move forward in her life....whether it be out of fear or laziness that she hasn't already, not moving forward in life to the next place of happiness makes one depressed and apathetic.
Perhaps a long talk about what SHE wants to do with her life, will help you in yours in the form of setting some ground rules and boundaries for both of you to work with in terms of your need for poly.
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