Here's a hypothetical story for you (although this could have happened to more than a handful of us). Your boyfriend of two years cheats on you with your best friend of five, and you find out through a mutual friend of all of yours. Unbeknownst to you, they had been secretly seeing each other for a few weeks even though he came home to you every night.
You are obviously beyond devastated after you hear this news. Of course this is a double whammy blow to the heart and ego, but my question is this: Who are you more hurt by? Who do you hold more responsible and who do you feel most betrayed by - your best friend or your boyfriend?