That’s interesting.
While “like” and “love” overlap (we say, “I love/like cake,”) “love” is more extreme. That’s true when we use it with stuff like cake, pets, etc. But it has a very different meaning when we use it with other people, especially with those of the opposite sex. It’s not the same as “like.” The difference between “like” and “love” is the same one between “friend” and “spouse.” As children, we liked many people, but the desire to actually love mostly started when we were around 14 years old or so, and it often involves sexual pleasure even if it were a homosexual relationship.
Psychologically speaking, “love” is almost always prioritized. It’s not merely happiness. It’s as if we exist just to love.
I think we should also include the love and caring of parents to their children to the definition of love because the relationship and the amount of caring parents give to their children are different than that parents would give to their friends. Relatives, especially siblings, might love each other, too.
There is no universal definition of “love”, because, I believe, what men call “love” is different than what women call “love.” If it were the same, men would find other masculine men (muscles, etc) attractive. That’s not true (except if someone is a homosexual). I actually don’t respect masculine men, and maybe even hate them. And I am sure you, women, also are not turned on by feminine behaviors or looks.
And when it comes to personalities, men tend to like submissive women, while most women would find submissive men unattractive.
Even on individual basis do we disagree on the definition of “love“ and criteria for attractiveness. For example, I love the introvert, shy type of girls. Other men would probably prefer the extravert ones, probably because it is easier to gain their trust.