"He planted this entire story ... Honestly, it's embarrassing and it's desperate for attention and it's pathetic," Dave Bettenburg tells PEOPLE of the man Lauren O'Brien was seeing before the show, wh

When Dave said he had mutual friends with two of Lauren's exes, she said they were never official boyfriends. However, Dave struggled with the fact that his fiancé was talking with another man shortly before appearing on "Love Is Blind," especially since he hadn't had a girlfriend in four years.