Some Kind of Stranger is really an anti-love song, though.

OK, I think I'll go for Metallica's Nothing Else Matters, because I do think trust and openness to learning new things are love-related virtues that do not get enough decent songs written about them. [ Though mind you, since hearing the Masters of Chaant version of it used in Coriolanus I'm much more inclined to hear it as a political anthem. ]