Poor Brian!  On the December 1 airing of 'Happy Together 3,' the singer revealed he almost asked out someone who was already in a relationship!

He confessed that he had an interest in Gummy in the past.  He said, "I didn't know she was dating.  I don't watch TV," revealing he had been clueless about her relationship with Jo Jung Suk. 

SEE ALSO: Jo Jung Suk returns to the big screen as the 'stunning' flight attendant Han Jung Mi in 'Pilot' trailer

He said that he grew interested in the singer while they were preparing for a concert together. "She was cute and would laugh at my jokes," he explained. "On the day of the concert, everyone told me. That she has a boyfriend. In the end, I realized she was just nice."

He said he really might have confessed his feelings if he hadn't known!  Aw, you'll find someone!