baby daddy issues

For the past couple weeks me and my sons father been constantly at each other's necks & I want my son to be able to see his dad we are both stubborn & it's not making anything better. All I be wanting to have is an understanding between us on the strength of our child because honestly a relationship is not going to work with us anymore I'd rather just Co-parent with him so that he can see his son , the fact that he continuously blocks me out really bothers me a whole lot knowing that he's gonna want to see his child. I will never hold his son away from him I just want our relationship to get better between us it seems as if he's scared or something because it's getting closer to my due date I'm 33 weeks I'm due March 11th , but why is blocking me out okay to him while I need him the most right now it's hurting me