How I wish to get old with you together unconsciously!
我理解这里不小心并不是通常意义上的“对不起,没注意”的“不小心”,而是“无意中,不知不觉”,所以选用unconsciously一词。
how I long for living with you to the end unexpectedly!
I want to never even noticed staying with you together till old
可能是这样吧
How I wish we can turn old together at a unexpected speed.
I just wanna to be with you till the end