"Walls" lyrics

I am a lost cause, I built up these walls
And won't let nobody through them
I put up my guard, you won't break my heart
When you try to pick up the pieces

Think of when we met, you broke down my walls
And gave up your heart to me
It was enchanting to meet you
I wish we could do it over
And I would have never taken your heart
And proceeded to break it into a million pieces

I am a lost cause, I built up these walls
And won't let nobody through them
I put up my guard, you won't break my heart
When you try to pick up the pieces

Kinda bittersweet, how I would feel
Resting my head on your shoulder
I wish that you were older
To break down my walls
I made mistakes and now I can't undo them
Broke my heart enough that I'm dying
I think about you smiling

I am a lost cause, I built up these walls
And won't let nobody through them
I put up my guard, you won't break my heart
When you try to pick up the pieces