Lyrics:

Do do do...
[repeated]

She was my once in a lifetime
and the ending come true.
Oh...I guess I should have told her
I thought she knew...

Do do do...
She said I took her for granted
that's the last thing I would do.
Whoa...I'll never understand it
'cause I thought she knew.
I thought she knew:
my world revolved around her
my love light burned for her alone.
But she couldn't say the same,
only myself to blame.
I should've known,
I should've known.

She was my once in a lifetime,
and the ending come true.
Whoa...
I guess I should of told her,
but i thought she knew.
I thought she knew,
I thought she knew...

Ooo...
Mmm...
Oh...
I though that...she...knew...
Yeah-oooo-oooo-hoooo