In his deeply consoling piece, De l'amour, Stendhal uses a fancy word for our modern day decadent term, 'crush': crystallisation. He describes it beautifully in the fifth step of how we get attracted to those who eventually possess an endeared position in our depths:
It [first crystallisation] first begins when you take pleasure in embellishing the lady of whose love you are sure with a thousand perfections. You look at all her happiness with an infinite feeling of contentment. You end up by wildly exaggerating her qualities and look upon her as an angel fallen from Heaven. While you do not yet know her you feel sure that you will soon possess her.
In the Stendhal mapping of this sweet-and-sour process of falling in love, a person supposedly next is entrenched within doubts of whether the beloved reciprocates her a similar regard or not. If the potential relationship endures this inevitable storm of doubts, the lover is deemed to grind through yet another crystallisation, which Stendhal claims to be the second and last one. In that second embellishment of the beloved, the doubts are silenced and hopes are hiked to their peak:
At this point, Stendhal does not go on to tell us a complete story of what happens after. All we know is that after the second crystallisation, all the roads are open, and there are rather countlessly many scenarios of where things could go for our lover. One of this scenarios is a quite unfortunate one of the love relationship not fulfilled for one reason or another. In this case, and by virtue of the second crystallisation, the lover is doomed into a great deal of unhappiness, which Stendhal associates with how strong the character of the lover is, and how deep his expectations of happiness with the beloved were. What Stendhal never mentions, though, is any possibility of a third crystallisation.
Stendhal is famously quoted as saying that a very small degree of hope is sufficient to cause the birth of love. However, the third crystallisation is one that is built on the ruins of an obliterated love and thereby requires a fully annihilated hope. It's a beauty, which the pessimistic eyes of the lover recognize after surviving the bitterness of failure. In a way, the crystallisation this time require a special type of embellishment, in which the lover not only disregards the preexistent flaws of the beloved, but also consciously discards the ugliness naturally conferred upon a repelling beloved. As helpless as she is, the lover succumbs to the crystallised beauty she couldn't strip the beloved of, and, if wise enough, sets on a journey to appreciate her 'luck' in being able to appreciate the beauty of that beloved, for it's indeed a blessing.