What I did to release any hatred towards my guy was focus on myself and if my mind wandered to him, I just reminded myself of his good qualities, because he has many, even though his actions in the past would have me think otherwise. It took a bit of practice but I now I can mostly think about him in a positive light.  
I can't imagine how hard it is considering how he left your daughter in the past but focus on how great of a family unit you both are together, you're both wonderful parents together and the past will only strengthen your relationship and family bond. 

This slipped my mind when I wrote my reply, thank you to Kavik for bringing up this important part of manifesting love. Focus on what makes you happy, do things that make you feel good. Watch a movie that makes you laugh, go for a walk, literally anything that'll make you smile!

Kavik wrote:

Work in  yourself, do some exercise, do things that make you happy, go out with some friends, I think that feeling good with yourself it's the most important thing you have to do. 

Also try with the technikes in this forum and see the videos of Veronica in youtube  

Sorry for my bad english.