Did it ever hurt for you to see an ex with a new partner years later even though you yourself have been in a new relationship?

Like say you've already had a girlfriend/boyfriend or been married for some years now, and then one day you see your old ex with a new partner, or you happen to see them on social media with their partner, and they're happy. You can clearly see they have no thoughts of you or the past and are living a good life, yet somehow you who are married or with a new partner feels sad from it, even though you shouldn't because you too have someone.

Ever experienced that?

Did it ever hurt for you to see an ex with a new partner years later even though you yourself have been in a new relationship?
Did it ever hurt for you to see an ex with a new partner years later even though you yourself have been in a new relationship?
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