break (someone's) heart

1. to make someone who loves you very sad, especially by telling them you do not love them any more.

He broke my heart, but I'll never forget him.

2. if an unpleasant situation or event breaks your heart, it makes you feel very sad.

It breaks my heart to think about all those poor stray dogs. (often + to do something)

• be out on your ear
• be out to lunch
• be over and done with
• be over the hill
• be over the hump
• be over the moon
• be over the top
• be own flesh and blood
• be own man
• be own master
• be own person
• be own woman
• be own worst enemy
• be packed like sardines
• be par for the course
• be part of life's rich pageant
• be part of life's rich tapestry
• be part of the furniture
• be past it
• be past sell-by date
• be past your sell-by date
• be penny-wise and pound-foolish
• be pie-eyed
• be pigeon
• be pipped at the post