新欢在怀你可曾思及于我
[xīn huān zài huái nĭ kĕ céng sī jí yú wŏ]
In this context, '新欢' means a new lover, while '你' refers to an ex or former lover. The sentence reflects a heart filled with melancholy, as the person laments whether their ex still thinks of them in the presence of new love.