The Things That I Don't Know

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