[Verse 1: Liam, All, Harry]
People say we shouldn't be together
We're too young to know about forever
But I say, "They don't know
What they talk, talk, talkin' about" (Talk, talk, talkin' about)
'Cause this love is only getting stronger
So I don't wanna wait any longerI just wanna tell the world that you're mine, girl, oh

[Chorus: Zayn, All, Liam]
They don't know about the things we do
They don't know about the I love you's
But I bet you, if they only knew (They don't know)
They would just be jealous of us
They don't know about the up all nights
They don't know I've waited all my life
Just to find a love that feels this right (They don't know)
Baby, they don't know about, they don't know about us

[Verse 2: Niall, Harry]
Just one touch and I was a believer
Every kiss, it gets a little sweeter
It's getting better
Keeps getting better all the time, girl

[Chorus: Zayn, All, Liam]
They don't know about the things we do
They don't know about the I love you's
But I bet you, if they only knew (They don't know)
They would just be jealous of us
They don't know about the up all nights
They don't know I've waited all my life
Just to find a love that feels this right (They don't know)
Baby, they don't know about, they don't know about us
[Bridge: Louis]
They don't know how special you are
They don't know what you've done to my heart
They can say anything they want
'Cause they don’t know us

[Builtup: Niall, Zayn]
They don't know what we do best
That's between me and you, our little secret
But I wanna tell 'em
I wanna tell the world that you're mine, girl

[Chorus: All, Zayn]
They don't know about the things we do (They don't know about the)
They don't know about the I love you's (I love you's)
But I bet you, if they only knew (If they only knew)
They would just be jealous of us (They would just be jealous of us)
They don't know about the up all nights
They don't know I've waited all my life (They don't know I've waited all my life)
Just to find a love that feels this right (It feels so right)
Baby, they don't know about (They don't know about us)
They don't know about the things we do (They don't know about us)
They don't know about the I love you's (They don't know about us)
But I bet you, if they only knew
They would just be jealous of us (They would just be jealous of us)
They don't know about the up all nights (Up all nights)
They don't know I've waited all my life (All my life)
Just to find a love that feels this right (Right)
Baby, they don't know about, they don't know about us
[Outro: Zayn]
They don't know about us