<human>: Give me a shortened version of the text

I have been in a long distance relationship with my partner since last November. We were FWB for about 2 years before that, and started to become very close right before he had to move back to his hometown last year. But we kept up with visits and such and decided to give a real relationship a shot. I love him very much.

When I visited him a few weeks ago, we got into a car accident that I think shook me up more than I knew. It wasn't a bad one in retrospect, we just went into the ditch and I got a little bruised up from the seat belt. He was fine as well. I feel like we handled it OK (apart from me crying after the adrenaline wore off) got back home and cuddled in his apartment.

But after being back home away from him sometimes I find myself alone in the evening and this anxiety comes…my mind wanders and I think how it could have been a lot worse, how your life can really end that easily, what if it happens again, what if I lose him early and how will I be ok without him, and on and on. We have an age difference that doesn't bother me other than when I get thinking – what if we have this wonderful future together and it's awesome and then he passes when I still have substantial years left, how horrible that would be.

I realize that's a lot of "what ifs" and this is a common existential worry, but it's been bugging me longer than I expected. How do people deal with these feelings? Do they just distract themselves? Does anyone know any reading or wisdom that's helpful? I don't feel ready to share this with him, I feel like it's an overreaction to something that happens every day. Maybe I just needed to vent.
<bot>: – my partner and I had a car accident and I am having a lot of anxiety about our mortality. How do I relax about it?