So I dated this friend of mine for a bit over one and half years. We're the same age, started studying history in university roughly at the same time and we'd worked on multiple shared projects so there's quite an overlap in our circles of friends. Anyway, we broke up in April last year (he dumped me because we weren't compatible enough for the relationship to last) but stayed friends.
The problem is that there are multiple mutual-but-closer-to-him friends who apparently think we're still dating. This has come up a couple of times now with people seeing me at a party or something and asking me things like "Where's X?", "When's X coming?" or "Why isn't X here?". They expect me to have knowledge of his plans etc. in a way a boyfriend would, but an ex wouldn't.
I don't really know what to do in situations like that. It'd feel weird to say "We broke up almost a year ago" when they aren't directly saying anything about our relationship but it also feels weird to let them to continue believing we're still together. Since we never a social media couple, we lived separately, and the amount of drama was minimal, there wasn't any kind of a big public announcement of the break-up, it just happened. If rumours haven't reached everybody by this point, it's unlikely to happen any time soon so I can't rely on the information just magically spreading everywhere.