Ending a relationship after having a baby

I just had my son a month ago and my boyfriend and I are in the middle of splitting up. It's been getting pretty ugly. He's been saying terrible things to me one minute and the next telling me how he loves me and will always chase me. I'm so heartbroken because I love this man but he is changing so much and we are not good together anymore. Any personal stories/words of wisdom? Prayers would be so appreciated.