You want it back, everything that you wanted to give to me
At a point in time when you and I were fine, now you don't speak to me
And I guess that's fine, your heart's not my responsibility
But there was time when I felt like I wanted it to be

But I can't say I don't care, I can't fix what's not there
And if you're listenin'
Let me say this loud without whisperin'

Why don't you grow up, grow up?
Should have known better
Should have known you'd never
Grow up, grow up
Should have known better
Should have known you'd never

So take it back, everything that you once said that I could have
'Cause if you didn't mean it, then I don't need it, I'll leave it at your dad's
Honestly, it's fine, I won't lose my mind tryin' sort this out
I'm just a human bein', runnin' out of feelings, nothin' to talk about

And I can't say I don't care, I can't fix what's not there
And if you're listenin'
Come on, please, we know you're listenin'

Why don't you grow up, grow up?
Should have known better
Should have known you'd never
Grow up, grow up
Should have known better
Should have known you'd never

I don't feel sad, I don't feel bad
I've not lost everything
Still got so much, I don't miss your touch
I don't miss anything

Why don't you grow up, grow up?
Should have known better
Should have known you'd never
Grow up, grow up
Should have known better
Should have known you'd never