2. Nina Dobrev & Ian Somerhalder
Here we have another clear example of why you shouldn’t date your co-workers. Nina Dobrev and Ian Somerhalder dated for three years while filming the television series, The Vampire Diaries. However, they eventually broke-up and there were rumors that it wasn’t pretty. However, their characters were a couple on the show and this led to some pretty awkward situations for the two of them!