The emotional bond that develops between adult romantic partners is partly a function of the same motivational system--the attachment behavioral system--that gives rise to the emotional bond between infants and their caregivers. Hazan and Shaver argued that adult romantic relationships, like infant-caregiver relationships, are attachments, and that romantic love is a property of the attachment behavioral system, as well as the motivational systems that give rise to partnership and sexuality.

After viewing the Ted Talk about romantic love, keeping in mind the idea of property of attachment.

https://www.ted.com/talks/helen_fisher_why_we_love_why_we_cheat

Are there any universally agreed upon (or consensus) components or aspects of love? Is there commonality with all the ideas of love like a cloud with a definite center but no clear, discernible boundaries? In your opinion, is love an adaptive behavior that maximizes our evolutionary fitness (survival)? If so, how so? Do you find validity in the idea of partnership and property of attachment?