Hey Roz,
My first great marriage started when I was teenager (we married after dating for three years and each getting our degrees) and ended with me being widowed at 46.
I got sick of being in my forties and being single so I started looking. I met my second great guy on the internet, though not on a dating site. He fell into my lap. Figuratively.
If something happened to husband #2, I'd try my best to go it alone. I wouldn't want to have to date. That is probably for me the most depressing thing I've ever heard of.
I think you've got this all figured out.