Do-do-do [Repeats] She was my once in a lifetime, Happy ending come true. Oh, I guess I should have told her, I thought she knew Do-do-do, She said I took her for granted, That's the last thing I would do. Whoa, I'll never understand it, Cause I thought she knew. I thought she knew: My world revolved around her, My love light burned for her alone. But she couldn't see the flame, Only myself to blame. I should've known, I should've known. A heart full of words left unspoken Now that we're through I'd sell my soul "to have this silence broken" I thought she knew my world revolved around her My love light burned for her alone But she couldn't see the flame Only myself to blame I should've known I should've known She was my once in a lifetime, Happy ending come true. Whoa, I guess I should of told her, But I thought she knew. I thought she knew, I thought she knew I though that, she, knew, Yeah