Sarah Silverman and Jimmy Kimmel Broken Up for Good?

Funny woman Sarah Silverman and her on, off and on-again boyfriend, late night host, Jimmy Kimmel have broken up again, according to Usmagazine.com.

"Sarah initiated the split this time," the source told Us. "He's bummed."

The couple began dating nearly six years ago and was together for five years before a break last July.  After the summer apart, they began dating again in the fall.

"He's really blue -- very down," another source told Us. "Seems like it's over for good this time. He's sad because he just bought a new place and now has nobody to share it with."

Kimmel was married to his wife Gina for 14 years before separating in 2002.

Silverman, the button-pushing comic and wickedly funny star of Comedy Central's The Sarah Silverman Program, which Logo recently helped bail out from an impending cancellation over funding, is a gay marriage advocate who has said she wouldn't marry until gay marriage is legal.