I've heard it said, what you don't know

Won't make you blue

But somehow with these words I can't agree

'Cause it's not the things I know you do

That breaks my heart, you see

It's the things that I don't know that's killin' me



I don't see you when you meet him secretly

But I think your arms have held him tenderly

So it's not the things I know you do

That breaks my heart, you see

It's the things that I don't know that's killin' me



The little things that you don't notice

Hurts me so

Little things no one but me could ever know

I will keep them hidden so no one will ever see

It's the things that I don't know that's killin' me



I don't see you when you meet him secretly

But I think your arms have held him tenderly

So it's not the things I know you do

That breaks my heart, you see

It's the things that I don't know that's killin' me