[ljm]

I'm single and living alone, no family in the picture. I have a very small circle of friends I love and who I trust implicitly. With their permission I ask them if it's okay to share some important things with them, in case the worst happens. Spare keys, contacts, etc. etc.

Those friendships might outlive any romantic partnership I do have in future. So I don't think it has to be a partner specifically. Of course, there are still some things that you might not share as openly even with that trust in place, but that doesn't stop you from having a backup plan.