We want to fall in love because we want so much to return to God. Of course we want to escape a darkened world. We want desperately to go home to a place where all of us can see how beautiful we are. Some people say that falling in love is a state of denial. It is, actually.
Guilt is the ego's orgasm.
Most people do not have the personality structure to hold on to the strength it takes to love without judgement. And so love's magic dies, casting Adam and Eve out of Paradise. As our minds are illumined, we become better at romance because we become better at being human. We become better at forgiveness and support and love. The enlightened world will not be one in which no one ever falls in love.