Sounds like you are still a bit obsessed with him, even if in the "opposite" way of not even looking at him. I think you have to learn to do something more middle of the road. I would spend time with your best friend because she's fed up with your talking about him and, obviously, only wants to discuss other, normal things beside him so much. That might help you? Be around people who don't want to talk about him and stay out of your head/being alone where you obsess.