It was a terrible thing, to love and not know whether you were loved in return, it led to the worst sensations—jealousy, rage, self-loathing—to all these lesser states.
The past is subject to all kinds of revision, it is hardly a stable field, and every alteration in the past dictates an alteration in the future. Even a change in our conception of the past can result in a different future, different to the one we planned.