This song is about a couple who loved each other but the timing wasnt quite right for them and he is letting her go from his life to make sure she can live her life without him holding her back. You can love someone so much but still have to let them go due to timing or circumstances. He would have her back in second. but she's got to lead her life first.

I know what this situation feels like. Every time I hear this song it reminds me of what I had with someone and it breaks my heart that we did what we did.

You could be happy and I won't know
But you weren't happy the day I watched you go

And all the things that I wished I had not said
Are played in loops 'till it's madness in my head

Is it too late to remind you how we were
But not our last days of silence, screaming, blur

Most of what I remember makes me sure
I should have stopped you from walking out the door

You could be happy, I hope you are
You made me happier than I'd been by far

Somehow everything I own smells of you
And for the tiniest moment it's all not true

Do the things that you always wanted to
Without me there to hold you back, don't think, just do

More than anything I want to see you, girl
Take a glorious bite out of the whole world