She's split up with her boyfriend.

她和男朋友分手了。

I split up with my last boyfriend three years ago.

我和前任男友在3年前分手了。

I really put my foot in it with Ella—I didn't know she'd split up with Tom.

我真的冒犯了埃拉—我不知道她和汤姆分手了。

I just split up with my girlfriend of 4 years.

我刚和交往了4年的女友离婚。

I just split up with my girlfriend of four years.

我刚和交往了4年的女友分手。