[Verse 1]
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

[Pre-Chorus]
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'

[Chorus]
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

[Verse 2]
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

[Pre-Chorus]
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'
[Chorus]
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

[Bridge]
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

[Chorus]
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