Interesting points everywhere; impressive.
On the subject of love, I have some thoughts:
I understand "love" as strength; a curious personal comfort in vulnerability. To openly love is to lead a lifestyle of tremendous courage and risk.
Obviously there are variations in how profoundly one can express/feel love both as an ideal and in practice. Even within the philosophy of "love", we find barriers both in (unavoidable) acts of self-service and false positives within our perception of how others "love" us. Within the interpretation, we derive a system of governing ethics that serve to define love contemporarily and for generations yet unborn.
Our awareness (and personal capacity) for love is likely determined by a complex network of stimuli ranging from the simple (what we observe in ourselves v. what we observe in others); the instinctual ("love" as a zone of comfort reducing obstacles toward reproductive efficiency and ultimate security of our species) to the profound (the interplay of culture; sense of personal fulfillment; historical viewpoints - both from an educative (institutional) and parental (domestic) standpoint.)
The sophisticated flexibility of this mythos permeates expressions of love into a million windows that guideline our behaviors with impossible complexity.
Love is evolution.