comforting the lovelorn
Refers to the act of consoling someone suffering from unrequited love or heartbreak. A somewhat literary or expressive compound.
To comfort my friend's broken heart, we went to karaoke together.
Compound of 恋 (こい, 'love') and 慰め (なぐさめ, 'comfort, consolation'). The exact historical derivation is uncertain, but the meaning is transparent from its components.