‘说好一辈子不分手’ 英文怎么说？

We promised that nothing will do us part.

（传统英文结婚誓言里面有一段是：untill death do us part 直至死亡将我们分离，因此我觉得分手用do us part 比较深刻）

Oath has been taken that never shall we depart.

We promised never to break up forever.

we have promised to be together all our life! (最简洁精确)

we have promised that we will never be part from one another.

You say that we are together forever!