"The heart shape (❤, ♥️) is an ideograph used to express the idea of the "heart" in its metaphorical or symbolic sense as the center of ...
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emotion, including affection and love, especially romantic love.
The "wounded heart" indicating lovesickness came to be depicted as a heart symbol pierced with an arrow (Cupid´s), or heart symbol "broken" in two or more pieces." - (en.wikipedia.org 26.09.2019)