I want it that way by Backstreet Boys

Could I ask a question about the song, please?



Q: Line 6 from the bottom, is it "we've fallen apart" or " we're falling apart?"

Thank you.

Q: By the way, is the usage "line 6 from the bottom" correct?

Part of its lyrics are:
You are my fire
The one desire
Believe when I say
I want it that way

But we are two worlds
apart
Can't reach to your
heart
When you say
That I want it that way

Tell me why
Ain't nothing but a
heartache
Tell me why
Ain't nothing but a mistake
Tell me why
I never wanna hear
you say
I want it that way

Am I your fire
Your one desire
Yes I know
It's too late
But I want it that way

Tell me why
Ain't nothing but a
heartache
Tell me why
Ain't nothing but a mistake
Tell me why
I never wanna hear
you say
I want it that way

Now I can see that
we've fallen apart
From the way that it
used to be, yeah
No matter the distance
I want you to know that
deep down inside of me