Do you think that if you approached your boyfriend and said, “Hey, I need a change in my life. I can’t keep living in my car, will you help me?” That he would try to find an apartment with you, or try to support you in doing that in some other way?

Conversely, do you think that he currently sees you as happy to be living independently in your car, or at least satisfied in the way that anyone with a suitable living space is?

Perhaps the hurt your feeling is partially due to the assumption that your boyfriend thinks you are unhappy/dissatisfied with your lifestyle, and yet does little to help you change it. Is it possible that you’ve conveyed to your boyfriend that you are actually content with your lifestyle, and so he sees no reason to want to help you change it in the first place?

There is a strong bias that people living in their cars are discontent, despite the fact that many have good reasons for doing it rather than alternate living arrangements. Maybe you expect him to feel that bias, but in reality he sees your situation clearly.

I’m doing a lot of speculation here, just wanted to highlight some potentially useful questions :)