I fell in one-sided love with him.

我陷入了对他的单相思中。

youdao

He writes her constantly but gets no reply; it's a case of one-sided love.

他经常给她写信，但一直收不到回信。这就是一种单相思。

youdao

This assumes, of course, that you are having a relationship with someone who loves you, and not a one-sided love affair with someone who isn't interested.

当然，这个假设，是建立在你与一个同样爱你的人之间的关系上的，并不是一厢情愿的单相思。

youdao

So far, however, the Kurds' love affair with the Americans has seemed one-sided.

ECONOMIST: Iraq and its Kurds