Heartbreak is more than just a painful type of disappointment or failure. It hurts in a different way because heartbreak is always connected to love and belonging.
Heartbreak comes from loss of love or the perceived loss of love.
Brene Brown Atlas of the Heart p. 188
Heartbreak can come from being rejected by the one you love. The pain is more intense when you thought the other person loved you, buthe expection of returned love isn't necessary for heartbreak.
Brene Brown Atlas of the Heart p. 189
The Heart is Open