She fell in love with someone who wanted to keep pining away in private, and he resented her for ruining that and for attempting to love him, doggedly, out of the shadows and into the light.
"If you can't be with the one you love," a friend of mine says, "love the one who looks, acts or makes you feel closest to the one you love."
Other people might call this having a type. Personally, I think it's an expression of grief for an original and vital soul loss.
We hide in plain sight, in our bodies.