Hermione:

When I first met you seven years ago
I was overwhelmed with emotion
Who knew a first year with reddish hair
Could instigate such a commotion

Ron:

You were the most annoying person I'd ever met
And I confess that I made fun of you
Bushy hair and obnoxious in every class
Never dreamed that I would love you

Both:

But I love you
I love you
I love you more and more and more every day
And I know now
I'm never letting you go

Ron:

Remember fourth year when we went to the Yule ball?
I was alone and you were with Viktor Krum?
I was so jealous that I ruined your evening
How could you have gone with a guy so dumb?

Hermione:

Remember sixth year when you went out with Lavender?
All that snogging made me sick
So I didn't talk to you for two whole months
Oh Ron, you may be cute but you're pretty thick!

Both:

But I love you
I love you
I love you more and more and more every day
And I know now
I'm never letting you go

Hermione:

You left me in the woods
And I thought I was going to die

Ron:

But every day that I was gone
I missed you

Both:

I would cry cuz
I love you
I love you
I love you more and more and more every day
And I know now
That you're the one
And I know now
I'm never letting you

Harry: Oi! There's a war going on here!

Go!