The Difference Between "Already" and "Only"

I say it's already been three years
But it's it's only been three years?
It's already been three years since I got over you
It's only been three years since been covering my feelings
When I say already
It implies I'm already done
We're already done
And my feelings already died
But I know its only
I'm only pretending
Only trying
And my feelings were only dorment
I can't say only
Then you'll know that I haven't
Can't
Won't
Get over you
Just let me say already
Don't challenge my word choice
I'll crumble into you
Just like I used to
Only three years ago
It's already been this long
It's only been this long?
I've already moved on
I'm only trying to move on
My heart is already broken
My heart is only begone to break
You've already gotten over me
I've only started to pick up the pieces
Your feelings and mine
The difference between already and only