I know many writers and spiritualist like to make statements about love being this or that creative force ext. But we do know what love is. Love is an emotion until there is anything to show otherwise. You speak of that we don't yet fully understand love and it being a concept as well as a phenomenon. I'm not sure where your getting that from. We don't fully understand how consciousness works but that surely doesn't mean we don't know that love is an emotion.

Can we prove definitively that particles don't have a subjective experience aka qualia? No. But we can say its highly, highly, highly unlikely. So to me its quite a of s stretch to say things like "we don't know if particles can love". Particles are particles.

I often like to think that something like love is the guiding force of creation and our existence. I mean what would be better but we just dont know do we?