I feel similarly - it’s kind of sad that I’ve found more understanding people on the few forums I belong to than in real life, but it does show they’re still out there, even if I don’t know them in person. Some of my family are empathetic, but it feels like the more distantly related they are, the better, which is weird.
It is frustrating, though. Maybe a lot of the people who tell others to open up about their issues (not meaning anyone here) already have a decent friend/support circle and assume everyone else does, too?