OK, here's two different psychological takes on love:The sociologist John Alan Lee divides love, based on ancient Greek terminology, into "eros" = erotic love, "ludus" = uncommitted, game playing love, and "storge" = friendship love... Lee has also been quoted as saying "I make all these theories about love because I can't seem to get any, boo hoo."
Well, actually what he said was slightly different, but the sense of it is the same: "I have studied love because it is my life's most difficult problem. Although I have made much progress, the 'impossible dream' of a truly fulfilling mutual live remains a goal I have yet to achieve."
Another theory comes from the psychologist Robert Steenberg's triangular theory of love, where love is made up of three different components: intimacy, passion, and commitment. "Consumate love" is a combination of all three.
Of course, you sort of have to wonder what right a psychologist who spends all his time in some lab or classroom has to try to define love.
Then again, why should anyone try to define love or attraction? It may be an interesting academic exercise to sit down and try to define love, but I doubt you go around looking at girls and rating them on a three-dimensional scale of attractiveness before you decide whether or not you're attracted to them.