I will use my life to love you.

我会用我的一辈子来爱你。

youdao

I will devote all my life to love you!

我终其一生都爱你的。

youdao

If your heart died, I'll use all my life to love you.

如果你的心碎了，我会用我的生命去爱你。

youdao

I just want to do what I love, you know, with my life,

我只是想用我的一生去做我喜欢的事情，

我的书出版了 - SpeakingMax英语口语达人

The rush came because the Mandarin for 4 January 2013 sounds similar to the phrase "I will love you all my life".

BBC: 'Love you forever day' prompts Chinese wedding rush