The best way to ruin a perfectly wonderful friendship?Have sex with your BFF.A mistake.That's what Troy calls what was easily the single best sexual experience of my life. He claims our "slip" was due to too much alcohol. I respond the only way I know how, which is by burying the entire experience under a six-foot mound of denial and regret. Lesson learned.When I'm finally in a place emotionally where I can move on with someone else, Troy does a complete...