Sarde sings this so sadly, as if there is just a little trickle love coming back to her from this person whom she loves so much. It is a lonesome kind of loving, that one-way love, the way she moans couldn’t love you more
But then that’s the main reason friends and lovers part: they simply do stop loving more; one of the two establishes a “less”, sees a limit, questions the value or temporal endurance of the relationship.
From that moment on there is no getting around it; the one who wants an ending will see plenty of reasons to separate–or will make reasons, no matter if a reason is valid or fictional.
The best the other can do is "To give space when what one most yearns for is closeness, that is both the great test and great tragedy of love“