This year, my best friend and I will celebrate our 20th anniversary of living together. Twenty years in a relationship that, for a long time, I have struggled to describe. We are friends, companions, emotional but not sexual intimates, and we’ve built a partnership that shares attributes with traditional marriage, open marriage and polyamory. As our significant anniversary looms, I’ve been looking back over our time together and attempting to find a definition for what we are. I first met Susie in 1995 when I abandoned my fledging career as a jobbing actor to move to Edinburgh with my then-boyfriend. He and I rented a room in Susie’s flat for our first nine months there. I felt an instant connection to her, and we soon became good friends. Even when my partner and I moved into our own place, my friendship with Susie continued....