But it's breaking my heart, it's breaking it off

但是我却因此心痛不已

Break off（使）分离； （使）脱离； 停止； 断交

例句：

She was obliged to break off from these very pleasant observations.

她不得不中断这些十分愉快的自言自语.

He would not break off negotiations by a sharp denial.

他不会断然拒绝对方的要求而打破谈判.

Romola's heart swelled again, so that she was forced to break off.

罗摩拉的心又强烈激动起来,以致不得不突然停住不说了.

Making it worth the pain that we go through

仿佛一切经历过的痛苦都已值得

go through（法律、合同等正式）通过； 用完； 检查； 完成

例句：

But will anyone have the bottle to go through with it?

但是谁会有胆量经受这件事？

Actors go through the motions of different types of labor.

演员们假装从事不同的劳动。

He doesn't have to go through this elaborate display for my benefit!

他不必为了我作这么详细的展示！