I've heard the statement a lot of "you are not your OCD," and have been trying to think about mine as a parasite that has latched onto my brain and screws up how I think about lots of normal things.
But at the end of the day, most of my life is controlled by my brain. And there is no parasite. It's more like I have some brain damage so that everything that passes through the malfunctioning OCD part comes out slightly warped. And I'm mad that other people have a brain that doesn't do this and I feel like mine should be like theirs. But if most of what I do comes from my brain, and I'm having a hard time not thinking about it as part of who I am.