“暗恋”和“单恋”用英文怎么说

暗恋
Unrequited love;fall in love with someone secretly
例句：

她暗恋着他。
She bore a secret love for him.

老外的地道表达是：carry a torch for sb 意思是单相思，暗恋
例：
1.She has been carrying a torch for John for almost two years.
2.Dave is still carrying the torch for his ex-fiancée.
3.我暗恋她三年了I have carried a torch for her three years

love sb in one's heart
carry a torch

carry a torch 单恋
surreptitious love 暗恋

单恋one side love
暗恋unrequited love

暗恋love by stealth
单恋carry a torch