"I'd go back to December"

"I'd go back in time and change it but I can't

So if the chain is on your door, I understand

But this is me swallowing my pride,
Standing in front of you saying I'm sorry for that night
And I'd go back to December
It turns out freedom ain't nothing but missing you
Wishing I'd realized what I had when you were mine
I'd go back to December, turn around and make it alright
I'd go back to December, turn around and change my own mind
I go back to December all the time"