One can only sympathize with the speaker. She's deeply in love, and yet the object of that love is about to leave her for an unspecified period of time. It's only natural that she should express such sorrow at her lover's departure, even going to the extremes of expressing indifference whether she lives or dies.

This is what love can do to people. It can so easily make us lose all sense of perspective and torture our souls night and day with uniquely powerful, intoxicating emotions.

Such a terrible fate can happen to the best of us. But the speaker is in an especially vulnerable position given that, as she frankly confesses, she is "soft and made of melting snow". One gets the impression that she lacks the emotional maturity necessary to handle the departure of the unidentified monsieur.

Perhaps in due course she'll learn to get over him and develop a more mature outlook on life, love, and relationships. But for now, it's impossible for her to do so, and so in the meantime all one can do is express profound sympathy at her heartbreaking plight.