Love is adapted from one half when the insecurities of one person become greater than their own self confidence
Love is adapted on the other half when the self-esteem of a person is enough to be given to another, in hopes for it to be reciprocated
When one half reaches the quintessence of inner confidence through the charisma and compassion of their "lover," he/she decides they're independent enough to complete their own individual path to spiritual enlightenment, while the other half becomes dead weight that is dragged along with them
The other half is so immersed in the happiness of their companion, his/her quest to enlightenment becomes conjoined with the path of their other half. Instead of working on his/her own quest to knowledge and understanding of the real truth behind love, their vision is vaporized into thin air to compensate for their partner's path to illumination. When one half has reached individual insight, their other half is swiftly disregarded and sent into a nightmare of insecurity and restlessness where they can only be woken up from the confidence and compassion of another human being. This is the most vicious cycle humanity will face until its demise.
Love is not a goal of solidarity, but rather a temporary method of combatting the insecurities you are subconsciously not aware of.