Hmama, one thing I'm learning is that people are generally so busy thinking about themselves, that they rarely think of us.
I suppose he feels guilty. The freezing car is more palatable to his conscience than the warmth of your home.
I suspect, it has very little to do with acknowledging your existence. You are wonderful, whether or not he comes into the house.
Hugs
M 19 years, MC for 8 months, DB'd for 8 months 4 kids; 18, 15, 14, & 10 I was never meant to be a doormat. It took me years of therapy to become assertive enough to stop his abuse.