carry a torch for

US /ˈkæri ə tɔːrtʃ fɔːr/
UK /ˈkæri ə tɔːrtʃ fɔːr/
"carry a torch for" picture
1.

memendam cinta, mencintai seseorang secara sepihak

to have strong feelings of love for someone, especially someone who does not feel the same way about you

:
He still carries a torch for his ex-girlfriend, even though she's married now.
Dia masih memendam cinta untuk mantan pacarnya, meskipun dia sudah menikah sekarang.
She's been carrying a torch for him since high school, but he never noticed.
Dia sudah memendam cinta padanya sejak SMA, tapi dia tidak pernah menyadarinya.