“Ha aggiunto un cuoricino a ” means “he/she added a little heart to …” in Italian. In social/media context, it usually means the person reacted with a heart or liked something with a heart.

Natural English

  • “He/she added a heart to the photo/post.”
  • “He/she reacted with a heart to the image.”
  • “He/she liked the post with a heart.”

Meaning in context

If it appears on social media, it usually suggests a warm or affectionate reaction, not necessarily anything romantic.

For example, “Ha aggiunto un cuoricino a un’immagine” is commonly understood as “He/she added a little heart to an image”.

TL;DR

It’s basically a heart reaction: “added a little heart” or “reacted with a heart”.