"You see him question my dad and it's his friends and it's his sister, and it's all of these things," Lauren O'Brien tells PEOPLE of ex Dave Bettenburg's reasons for ending their engagement

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.