How Long?

How long does it take to get over someone? It's been almost a year and my feelings haven't changed. The circumstances have--drastically. But my heart has stubbornly refused to budge. I don't know what it means. I wonder if I'm doing something wrong. Is getting over someone just a matter of time, or is there some magic thing I'm supposed to do? I've tried everything I can think of. I told myself it's over. I told myself to move on. I've tried being friends with him and it hurts like hell. I've tried cutting him out of my life, but even when I never see or talk to him, nothing changes. I've tried dating other people but I feel nothing. I've prayed over this constantly, and God hasn't given me any answers either. I never had the moment I was supposed to have--the one where you realize why that person is all wrong for you and even though it hurts, you understand why it had to end. I never got that. It's still a big unanswered question. I don't mind being single and I'm not afraid of being alone--even forever. But I'm terrified of forever loving someone who doesn't love me back.