<human>: Can you give me a shortened version of the text?

Both my own mother and MIL have told me this is pretty natural and it will pass with time. The thoughts have died down only a little bit, I no longer think about him getting hit by a car on the way to work every  morning, or getting really hurt by the big machinery at work everyday. But every few days or so, mostly when I'm lying in bed alone, the random, unwanted thought of what would happen if he did die hits me. Sometimes I can push them off, especially if I'm with him, or distracted, out in public. If it happens when I'm alone, I don't have the same ability.

We've been together over a year now and in fact, tomorrow will be the first anniversary of my moving in with him.(Just realized that now, wow.)  It doesn't help he has health issues as is, he was a very sick baby and had multiple issues. He still has heart problems and even liver problems, cancer runs rampant in his family. I can't help being worried it means he's going to have a short life. On top of this, this is actually my first proper relationship, let alone one so serious that we discuss marriage venues and whether or not we're having kids. We live together. I don't think I'd ever be able to fully cope if he died and left me all alone. It breaks my heart when we're walking together and the random thought of a car coming too fast around a corner and taking him out, or some other stupid shit like that.

I know it's unfounded, and certainly something I shouldn't stress on, but I'm reminded everyday that unfortunate things happen to people who weren't expecting it. Young lives and love ruined by tragedy. I don't want to be apart of that.

I can't stop anything like that happening, it's not within my power, so I shouldn't bother stressing. But I bloody well can't. I want to stop but don't know how.
<bot>: can't stop thinking of hypothetical situations in where my partner is dead. What I'd do, how ruined I'd be and so on and so forth. Would like to be able to stop.