It is often confused love with passion while love would be born precisely after the passion that boils down to a feeling of fusion (thus negating differences) where love is the fruit of a meeting between the two real personalities, to create a "We" enriched melting moments and remoteness, growing through the inevitable crises, not aiming to solve what can not be, etc.
In short, it must not neglect physical attraction as a starting element, only the maturity of each, the admiration of what is really the other (not that it shows to seduce intialement) and the fact of not wanting to mold it in his image seems to be that happy couples through time.
Thank you
Christian