In Plato's Symposium, his fictional character, Aristophanes, promotes a union theory of love.
Aristophanes recounts how when God first created humans, we were round, spherical, androgynous forms. We had no gender but instead had four arms, four legs and two faces. However, God decided to punish us for our arrogance. He severed humans into two, leaving each human with two legs, two arms and one head. In doing so, he condemned us to a lifetime quest of finding our other half and unifying to become whole. This quest to find the other half of our union is what we now call love.
Evolution has demonstrated that we were not created by a divine being but evolved from primates. Therefore, Aristophanes' story and theory does not hold up in the face of modern science.
[P1] Humans were once an androgynous spherical species. [P2] God separated us. [P3] We seek to find the other half to become whole again. [P4] This process is love.
[Rejecting P2] God did not create us.