Over time, people have given the term LOVE various differing meanings based on their own paradigms.
Wiktionary’s British English Dictionary defines love as a profound and caring affection towards someone. GoodTherapy defines love as a complex set of emotions, behaviors, and beliefs associated with strong feelings of affection, protectiveness, warmth, and respect for another person.
Just as there are many definitions (even contradictory ones), there are disagreements among people as to which definition should be considered valid and which to be rendered invalid. Due to the controversy surrounding it and yet the pleasurable nature of the subject both in terms of discourse and in practise, love has been an interesting concept/topic for poets, writers, scholars, philosophers, religious leaders, counsellors, public speakers, etc.
Since no single definition has been able to encapsulate all LOVE stands for, it remains a debatable and researchable concept for many.
I have heard many, both married and unmarried postulate strongly that love isn’t enough to maintain a relationship, whether among singles or couples. According to them, mutual sacrifice, commitment, patience, etc must be invested in every relationship to ensure it gains enough root to stand any test time brings.