It starts as necessary for survival. Want what we think is best for them. Definitely, but not romantic love we are talking about. More of an acceptance and empathy. Romantic love is in a category by it self.
Love is composed of a single soul inhabiting two bodies.
Aristotle Romantic love is as real as anything else, mostly on a feeling level. St. Valentine's day may be a focal point, or an excuse to approach the person of your affections and still feel pretty safe. About being in love. Love is overwhelming and dominates the consicosness for all but the most vital life support functions. The world feels right.