Choucho's (An amaaaazing singer who dubs Vocaloid songs) version:

And the off vocal:

Lyrics:

Just be friends All we gotta do
Just be friends It's time to say goodbye
Just be friends All we gotta do
Just be friends Just be friends...

I thought of it yesterday after the dawn had passed
While I was gathering pieces of a broken glass
What is going on now with drops that my fingers allow
Is this really what our hearts decided to be last?

I had known at the very deepest dephs of my heart
That the best choice was the hardest from the very start
It keeps on opposing me, since I know my love cannot be
Then when can I tell you, if at all, before you depart?

In a world where everything is slowly being broken down
I'm struggling, but I know that it's for you to be around
While your engraved smiles are fading away
I should end it all

My voice is dry from calling out your name
Echoing off the walls to reach nobody
There's nothing left for me to be connected to you
While I am standing here all by myself, all alone

All those things that just happened to happen
What brought us together is now falling apart
I said that how life takes us probably be cannot be changed
After all, someone's tears will still be falling down

All we gotta do Just be friends
It's time to say goodbye Just be friends
All we gotta do Just be friends
Just be friends Just be friends...

It occurred to me in the tranquility of last night
That gathering wilted petals won't make them alright
It never grew to a great size, though it was already dead to my eyes
Saying we finished a long time ago is too polite

I remember the season when me met so clearly
You had a certain grace when you smiled sincerely
Saying things we didn't want to recall, with no regard to our feelings at all
Our hearts must be laced with thorns that hurt severely

If we continue this relationship that lacks excitement
It's too bad that change of mind won't have incitement
Though I will always love you, and I don't want to leave you
I must let you know

My head is caught outside the eye of the storm
I can't believe it, I just can't see past the winds
Even if I'm so determined, rain seeps past my shelters
And soaks me with a coldness that no covers can defrost

Anything that tethered us two together
Seems to be breaking even more everyday
Goodbye to you, my dearest love, for we've come to the end
And now we will have to part ways without ever looking back

If only this once, if only this once
My wish could be made to become true
I'd ask to be born once again
And when I am, I will go to you in those days

My voice is dry from calling out your name
Echoing off the walls to reach nobody
There's nothing left for me to be connected to you
While I am standing here all by myself, all alone

Anything that tethered us two together
Seems to be breaking even more everyday
Goodbye to you, my dearest love, for we've come to the end
And now we will have to part ways without ever looking back

Because we've finally reached the end 

Lyrics from here