A footnote in someone else's happiness?

what, or where, is that from? i keep seeing it everywhere.A footnote in someone else's happiness?
It's part of the lyrics to the song ';Does Your Husband Know'; from Fall Out Boy:





Mr. sandman's showing his demon


He's into the rooms of yours


Moving in, until seen


Surf eye bank waves


Click back and forth i go


Headlights sipping bottles through a candle


Spark like flickers of past dreams flooded


This is the stand i'm taking, i wrote,





';i don't just want to be a footnote in someone else's happiness';





Does your husband know


That the sun shines blues follow me everywhere?


Does he know (way)


Does he know (way)


Of the quick lips that would convince me to call it a night





I will never end up like him


(behind me back i already have)


Keep a calender this way you will always know





The last town you came through


Oh, darling i know what you're going through


The last time you came through


Oh, darling





Tempest in a tea cup, yet unique


Sip intimacy from a boy like me


Cross hearts like arrows over brown eyed landscapes


This is the stand that i'm taking, i wrote,





';i don't just want to be a footnote in someone else's happiness';





Does your husband know


That the sun shines blues follow me everywhere?


Does he know (way)


Does he know (way)


Of the quick lips that would convince me to call it a night





http://www.kovideo.net/lyrics/f/Fall-Out鈥?/a>A footnote in someone else's happiness?
fall out boy!!!!!!!!!!!!!!!!!!!!


from their new album, folie a deux