According to the Daily Mail, Howard recently split from Jennifer Clark, who he met on the Channel 4 show.
"He and Jen are no longer an item," said a spokesperson. "They want to make sure they stay friends to enjoy the finale and the wrap party together."
Howard, who was voted off Big Brother in week nine, apparently grew tired of the complications in his relationship with Clark, who is still married and has a child.
He allegedly partied with Houghton at London's Chinawhites following the split.
Houghton, 25, won the celebrity version of the show in 2006.