Perhapd etiher writing them down to talking them out to a counselor will give them less power than if they stay in your head..it sounds like you have a supportive boyfriend..as for their purpose, what is the purpose to anything that is mental illness related? Mental illness is a scary, lonely disease. And it attacks you over and over, much like these thoughts are going over and over, over and over. Do you have journal? Keep it with you everywhere you go and get these things on paper, away from your poor head. My thoughts are out of control too, with negative stuff too, so I feel for you. Let us know how you are doing.