I don’t think my fiancé wants our baby….

We have two children currently. My oldest is not biologically his but he has been in her life since she was like 1. I’m currently pregnant now. We tried for over a year for this baby. He said he wanted another baby so badly. Ever since I got pregnant he has been so different. He is so mean to me. He has said during a fight that he didn’t even want another baby and then later on that he didn’t mean it. He is starting fights with me almost daily about anything and everything. I just don’t understand what happened. I understand being stressed out about having another baby- that happens, but to be so mean and cruel to me I don’t get it. I don’t know what to do anymore. This has been going on for months and it’s just getting worse. Has anyone dealt with anything like this before? Any advice would be welcome.

I have already tried talking to him about this numerous times. The conversation goes nowhere. He completely shuts me out.

Edit : He refuses to go to counseling.

As far as our relationship before I mean we had some problems like everyone else but it wasn’t like this. This is on a whole new level.