Real Dictionary

break sb's heart
phrase: If something breaks your heart, it makes you feel very sad and depressed, especially because people are suffering but you can do nothing to help them.

break someone's heart in American English
to cause someone great disappointment or sorrow, as to disappoint in love
to cause someone to be overcome with grief or disappointment, often, specif., by rejecting or spurning his or her love or affection
to make someone feel extremely upset and unhappy, because you end a love affair or close relationship with them