We underestimate the distance between ourselves and others. Not just inferential distance, but distances of temperament and ability, distances of situation and resource, distances of unspoken knowledge and unnoticed skills and luck, distances of interior landscape.
You want to know if the heart of a man or a woman can contain enough love for more than one person?. . . I think it's perfectly possible as long as one of those people doesn't turn into. . . a Zahir.