I think the kind of love he’s talking about is the love we were looking for when we were in High-school.  When I used to desire my ex’s, until I didn’t  get what I wanted from them, I didn’t stop desiring it. The truth is that even nowadays not only in High-school, as soon as the human gets what they want,  the desire is over along with the relationship. If we as human like it that much we will stay, because we don’t want that desire to never ends. Eventually, if you left it was because you stopped desiring it and you wanted to desire someone or something else.