Love derived from its types

I have explored three ways of looking at love: (1) seeing something precious in the beloved that causes us to respond in love, namely to protect, nurture, enjoy, give to and promote that beautiful precious thing for its own sake, (2) choosing to love another person regardless of whether we perceive any beauty or value in them, and (3) seeing the person's need for God's presence, and God himself welling up in us to be poured out to the beloved. These are three quite different views, but all have their overlapping aspects. Can we continue to push ahead and get to the heart of love itself?

Would another approach be to explore the types of love, as Caroline Simon has in her book? She explores neighbour love, friendship love, romantic love and marital love (that is as far as I have got so far so I am not sure what other types she has detected). Is there a possibility of seeing what these different types of love have in common, as well as what the three understandings above have in common, and perhaps derive an understanding of love's essence from that? I shall try to do so after considering what I have read. Stay tuned...