When something is so cute, adorable, lovely, etc. that it just makes you feel all wonderful inside.
"Oh man, the movie Wall-E is so cute! The way Wall-E loves EVE just makes my heart sparkle."
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a heart sparkle is like having a crush, but itโs not that far yet. when youโre starting to talk to someone and think you might like them, but donโt necessarily have a full-on crush itโs a heart sparkle.
Heโs so cute, I have a heart sparkle for him.
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