Carlos and Márcio are two long time friends. One day, an event leads Carlos to finding out that his best friend, Márcio, is gay. He sees himself paralysed against that revelation. What now? Amid that surprise, Carlos becomes the witness of a coward crime and decides to create a blog to narrate his suffocating agony. In that process, he comes across the violence motivated by the prejudice that creates victims that are from several segments considred minority by the society. By reading "My best friend is gay", we come across adventures, danger, fights, re-encounters and a good pinch of police romance that make the book a realist narrative, easy of being read, understood and experienced by the reader as if they are part of the story, no matter their sexual orientation, religion, culture or ideology.