The conclusion is holding me up while I figure out how to settle the emotional issues of the subplot. Do I go for the de riguer happy Romance Novel resolution, or throw in a disappointment to show that love is a highlight of life, rather than the norm? Or am I being too cynical in thinking that? Shouldn't I be finding the loving solution within my own heart, to prove that love can pervade from one area to bring light to the rest of one's life?

Perhaps. But I'd think you'd be able to feel out the correct ending after spending so much time with the characters. :) Don't make it a happy or sad ending to make a point; choose whichever feels most in line with the feelings that have kept you writing up to the end.