Counting down from the initial impact

Since I could never say this to you
And since you wouldn't listen even if I did:

It took one day to love you
And two to learn your name
It took three weeks to never forget you
And four to realize I'd never be the same

It took five months to finally fit in
And six to understand how much you cared
It took seven years to see what I've been missing
And eight to know when someone's not really there
It took me nine lifetimes to know what's right from wrong
And ten to comprehend who you were all along

It will take you one day to remember me
And two to call me by name
It will take three weeks to love me
And four to know you'll never be the same

It will take five months for me to trust you
And six to actually care
But it will take you seven years to understand what's missing
And eight to learn when someone's not really there
It will take you nine lifetimes to finally learn right from wrong
And ten to comprehend I'm not who you thought I was all along

You may ask me how I know this
And call it as a bluff
But I know the people in my life
And I know when enough is enough
But I know you most of all
Because you were just like me
But now that you have changed
I have to wonder what it means

I don't love you
I don't hate you
I don't really know what to feel
All I know is reality is fake when you're around
Even though right then; it's always the most real

So if you want to leave
Right here; right now
For whatever reason
I won't try to stop you anymore
I'll just ask for one favor:
Tell me you won't forget
Even if I do