Two other threads on the topic of Love.
https://www.physicsforums.com/showthread.php?t=47520&page=1
https://www.physicsforums.com/showthread.php?t=60756
Love certainly has been used euphemistically for lust and desire, which are not love, but expression of selfishness.
How about a simple definition of love - a strong affection for another arising out of kinship or personal ties. (I would emphasize 'affection' in contrast to 'attraction'.)
I love my parents, my wife, my children, my siblings and their families, my friends, my cats and dog, and others who are not really as close as friends. All those forms of love are however very different. All involve some degree of affection, but beyond that there is also a sense of
commitment.
And I personally take Love a step further. Love is not just affection, but love involves and abiding care, concern, consideration and respect for the other(s) involved in the relationship(s), and to some degree,
reciprocity and
mutuality.
The latter term is particularly important in terms of equal parties in a relationship, e.g. wife and husband. A wife and husband should be mutual companions and soulmates, in a reciprocal and supportive relationship. Marriage is an interdepedent relationship, and not one of dependence. Both husband and wife can have individual as well as mutual interests and balance can be achieved.
Marriage is particularly important in the context of having children - with both parents sharing responsibility for raising and nuturing the children. And from this, children learn to be caring, considerate, thoughtful, respectful, i.e. loving persons.
Finally, LOVE is hard work, but it is also, a most profound, spiritual and rewarding experience.