I think exploring why you want her so consistently would do you really good. Aside from her being the mother of your child, what is it you want so bad about her right now? What fills your heart with love about who she is right now?
Explore where these feelings are coming from. I think when I finally started asking myself those questions about my ex and realizing I had no good answers because he treated me so poorly, I began to see him for who he really was/is rather than who I wanted him to be, and boy did I become unattracted and almost disgusted.
