如何用英语翻译“爱不仅是一个承诺，更须彼此去守侯，守侯一辈子的幸福”

"Loves not only is a pledge, must each other defend the marquis,
defends the marquis for a lifetime happiness"

Not only loves is a pledge, must each other wait for, waits for happiness for a lifetime

看看行不 忽忽``

Love is not only a promise, but also needs each other to hold, hold the happiness for whole life.