Bobbi Kristina Brown is dating the guy she used to consider her "brother" -- because even their closest friends were shocked by the news.Bobbi feels she's doing nothing wrong by dating Nick Gordon, the guy her mother Whitney Houston unofficially adopted 10 years ago.Bobbi broke the news to her friends at a BBQ this week ... and no one believed it until the two kissed in front of everyone. We're told one friend felt the "relationship" was the result of each of them taking the death of Whitney too hard ... but they both brushed off that notion.
