When I think of all I put you through  Always taking you for granted  I never saw it from your point of view  Blinded by the double standard  You were tryin' to tell me all along  Something in the love was missing  You said "It's not too late to get it back"  But I just wasn't listening  If I knew back then what I know now  If I understood the what , when , why and how  Now it's clear to me  What I should have done  But hindsight is 20/20 vision  Now I see it in a different light  I've been losin' you in stages  Give us one more chance  I'll get it right  Girl , you're gonna see some changes  If I knew back then what I know now  If i understood the what , when , why and how  Now it's clear to me  What I should have done  But hindsight is 20/20 vision  Takin' time to catch up on some history  Tryin' to figure out what went wrong  with you and me  And it doesn't really matter  what's been before  But I know there's no future  with you walkin' out that door