break someone's heart
US /breɪk ˈsʌm.wʌnz hɑːrt/
UK /breɪk ˈsʌm.wʌnz hɑːrt/

1.
romperle el corazón a alguien, causar gran tristeza a alguien
to cause someone to feel great sadness or disappointment, especially in love
:
•
It would break my heart if you left me.
Me rompería el corazón si me dejaras.
•
She didn't want to break his heart by telling him the truth.
No quería romperle el corazón diciéndole la verdad.