English translation based on my own understanding of the song, credit to omnireal and Chance Chapman from LyricsTranslate website - it's a reworking with reference to both versions.

(https://lyricstranslate.com/en/%E6%84%9B%E4%BA%BA%E9%8C%AF%E9%81%8E-somewhere-time-somewhere-time.html).

I must have told you I love you, some hundreds of years ago (‘somewhere in time’; in our past life/lives)

It's just that you’ve forgotten, and I can't recall either (in this life)

?

(In this life)

Walked by, passed by, but we’ve never met

Turned around, looked back, yet we still missed the hints

We’ve never felt the love again (as we had in our past life/lives - as in we’ve never recollected the memory from our past life/lives)

(When we) collided in the street

Hasn’t your mom told you to

say sorry when you crash into someone (had you done so, we might have had a chance to start a story and be together in this life as well)

It ought to have been a great day

But then the lovers missed the moment (and thus missed each other in this life).