Ref is "refren" aka "refrain" aka chorus (a part of the song sung repeatedly at times).
It's uh... accurate in the way a google translated song can be. I'm incredibly bored right now so I guess I'll translate.
I always knew it,
that you exist somewhere
that's why I never felt regret
because of other's lips
I lied to every other girl
made hell out of their lives
I spent every night in bars
waiting for a new day and dreaming of you
[Chorus]
Right out of my dreams
your hair has scattered on the pillow
you crawled under my skin, white flower,
I've dreamed of you all my life, exactly as you are
This night,
[Chorus]
I cheated on everyone else
gave them false hopes
I looked for love everywhere
I was drunk and insane and dreamed of you
I never regretted it
I didn't pay any heed to anyone
I was always strong
but in front of you, I would now
cry like a child
[Chorus]
This night,
[Chorus]
[Chorus]
Don't change, white flower
I've dreamed of you all my life, exactly as you are