Yikes!

That stinks.
I'm sorry that you got into such a horrible care accident. I hope that you are okay physically & emotionally. I have been in a couple of accidents, over many years ago (thankfully), and they truly can be very emotionally damaging. Draining. Scary too!
Hopefully, your bf was pushing most of his fears away & instead chose to let anger out...because that's more socially acceptable to him?? Or, maybe he hasn't truly stopped to think what could have happened to you in that accident?
I would recommend that you have a seat with your bf and share how you have interpreted both his comments about missing his car, as well as his lack emotionally supportive comments for you. To avoid switching your bf into defensive mode instantly, of course, try to make your remarks about YOU and how you FEEL. "I feel ___, when ____."
Gentle hugs and best wishes to you!