I started to write a response to a comment in a previous post, and it turned into a post itself.
We did live with one car with up to six people for most of the time we lived in KC, until last January. We know how to do it, and we'll be fine. I'm going to miss the convenience of solving all those problem times of two people needing to be in different places that were so easy to fix with a second vehicle, but that's mostly a matter of planning and advance communication and a bit of compromise from everybody.
In fact, one car seems to actually result in a lot MORE driving, ironically. When we had two, I could do a drop off and Bill could do a pick-up, for example, and save me two or more long round trips. We definitely would not have been able to accept the house-sitting situation without the two cars, either (there was nothing in safe walking distance, and I would have had to drive to Stowers twice a day, if I wanted the car for anything else).
( But none of that is what's upsetting me, when I sit down to think about it. )That's a partner you don't want to lose.