best friends forever... with benefits of course ;-)

v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)

"best friends forever with benefits". when you and your boyfriend break up, and both still want eachother, and can't bear to be without eachother, you become bffwb.