If you had asked me, I'd have told you  There ain't nothin' I don't know  Like no matter how I hurt her, I just knew she'd never go  Up until the day she left me, I'd have sworn I'd never crawl  Well it's amazing just how much I've learned  Since I thought I knew it all    Figured she'd be much too frightened, to make it on her own  So I was sure that she'd come cryin'  After just one night alone  I kept waitin' by the telephone, so certain she would call  It's amazing just how much I've learned  Since I thought I knew it all    I never knew a broken heart  Could turn you inside out  I didn't know, that I didn't know  What love was all about    If she came walking through the front door  There's a million things I say  Like "I love you" and "I missed you, please don't ever go away."  And if you would just forgive me  I'll be at your beck and call  'Cause it's amazing just how much I've learned  Since I thought I knew it all  It's amazing just how much I've learned  Since I thought I knew it all