Why is it hard for some people to stop thinking about sad past memories?

I cannot stop thinking of you (sad audio) | Bridgerton | shorts

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😭😭 Sad whatsapp status 💔💔 stop thinking about her #sad love status #reels #shorts

Can't stop thinking of you #edit #sad

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When you can't stop thinking | #sad #alone #pain #broken #shorts #sadstatus

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Can’t stop thinking of you!!💜 #demonslayer #anime #rengokukyoujurou #sad

cant stop thinking of youuu #sad #relatable

POV: you finally stop thinking about what happend…#shorts#callofduty #sad#depression#pain

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Stop Thinking About Him #love #sad #pain #missing

Elon Musk, positive thinking 🤔, don't be sad

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Can’t stop thinking of you… #edit #sad #missyou #shorts

sad books i can’t stop thinking about ❤️‍🩹 #books #booktube #reading #fyp