I'm so sorry for your loss and it must be so hard not having anyone to talk to about it!
Everyone deals with emotions differently and I guess it is really hard when yo uboth have different ways in trying to cope with it. All I can say is try to do a little excerciece (this comes straight out of my mom and dads relationship therapy, so who knows...)
We'd call it the Buda. Literally both sit down oppisite eachother on the floor with legs crossed, straight back and take it in turns of like 5-10 minutes. First you'd be Buda. All you then do is listen and respond, but never judge! So he can say anything and all you have to do is listen (the hard part is responding without judging, just ask, how does it make you feel, or share the feelings.) Then after a while swap positions so you get to talk about all your feelings and he has to listen. This way he might be more likely to open up a bit and he gets to hear how you feel withouth you both ending up in a fight. If anyone starts to get angry, really, as the buda just tell them I feel your anger or something simple and calm like that and it really calms them down to ensure it stays a calm environment.
It really looks liek you both need to just get things out of your system eventually, so hope that this might help you, otherwise, there is nothing wrong with seking professional help (but I guess before you convince him of that there will be more fights, so hope something small like this might get him over the first hurdle).
Sorry about your friend as well, would really hope she'd understand to give you space or at least not make you feel worse by (I know she would never mean it this way) but asking you to babysit only brings back all the feeling, like I could have had one soon... I had the same after my mc, was realistic about it, but just seeing other couples with their bumps and smily faces just hurt me. If she is a cclose friend you like to share things with, maybe jsut explain how it makes you feel as well? Did she ever have a mc? or at least as she as been pregnant before she might understand a bit how it would have made her feel if she would have lost it?
Really hope you get through this and things will get better soon for you!