The perfume to express this important branch of love, agape, as equanimity and elemental compassion for all, might be a calming one rather than anything very rich and strange or exciting. I see it as one that connects us to the security and peace of childhood, or Nature, such as a simple rose or jasmine soli-flore, or the scent of citrus or melon, or the clean skin scent of white musk, or the comfort of vanilla, perhaps combined with some ozonic/marine elements.
This kind of love is not the same as our understanding of the essence of romance and passion that is the primary focus of Valentine's Day, that of Eros. Still, let's not forget we are constantly living in a world that requires all the forms of love, and we will most likely experience them all only as fully as we keep them in the forefront of our awareness, and not let ourselves get too distracted away from them.
The kind of love that can be complicated and difficult is sometimes the very one that has the power to melt the complacent, frozen heart within us. Here is one of my favorite quotes, from Kafka (for Valentine's Day, substituting the concept of love for that of art -- it works perfectly that way too):
If the book we are reading does not wake us, as with a fist hammering on our skull, why then do we read? So that it shall make us happy? Good God, we should also be happy if we had no books, and such books as make us happy we could, if need be, write ourselves. But what we must have are those books which come upon us like ill fortune, and distress us deeply, like the death of one we love better than ourselves; like suicide. A book must be an ice-axe to break the sea frozen inside us.
As it is with art and books, so it is with some loves. Our complacency is overturned and our compassion and maturity awakened, because it demands we learn enough to understand ourselves and the Other. Some forms of love are the essence and fuel of peace, and some are the force of necessary change in life and character.
As far as this relates to perfume, it is a powerful personal accessory in our emotional relationships with others. We all are familiar with the concept of its seductive and glamorizing aspects. The person wearing it takes on the reflected glory of the sensual experience of inhaling a beautiful composition, it wafts up into a person's head and then settles into the heart and mind. Being someone who chooses perfume or experiments with different ones more to satisfy private interests, it's important to remain aware that perfume may become a trigger, a memory in the heart of the next person who loves us, or is simply just beside us. Let's not forget that power of perfume as we make our choices. So consider how your perfume(s) will evoke memories. The balance of all the kinds of love in your life, easy or difficult, where ever and however they may manifest themselves will be connected to you by others through your scents. That's basically what they are for, and most often what they were well-designed to do.
Mystery link for the purposes of credit to above photo here.
An extra diversion, some beautiful animals with Valentine heart shaped markings here.