I can't help falling in love with you.

我不由自主地爱上了你。

So you've met the wrong person, and maybe you kind of even know they're wrong for you, but you can't help it — you're falling in love.

你遇到了一个错的人，也许你甚至知道他/她不适合你，但你就是陷入爱中无法自拔。