Advice On My Child Father

I love my child father we have been together for 3 years but every since we found out I'm pregnant he has changed... One min he want  wants to be here for me the next min he says he not ready for a kid and he has me feeling like I'm alone in the situation. I'm to my breaking point I love him a lot and want to have a family with him... ANY ADVICE WHAT SHOULD I DO ???? HELP TIRED OF STRESSING !!! 
Due Date: December 2nd 2016