love...???

I want to feel really wanted and loved. I am dating someone who says he loves me but I have not felt it lately. Great father to his children and wonderful man. We've been dating 9 months. I felt more the first few months than I do now. What's wrong with me. Hes a good man. The only times I really fell head over heals for someone they left me. I should be happy now but I don't feel it. I am just selfish and want to much.I wanna wake up thinking about someone and go to sleep at night thinking of them. Why can't I feel this way now about this man. I feel lost.