I've got one distinct flaw in my personality, and that's that I mostly never initiate conversation with people. I participate in banter, I chat all right with folks, but I'm never really start it.
It's become a little obvious when a friend from a group says a passing hello and gives the 'we should play video games again sometimes'. That was like two weeks ago, and I'm feeling anxious to try and join the old group of acquaintances. Like, if I'd get asked to join, I wouldn't hesitate for one second, but if I don't get a direct invitation I'm straight up afraid to join.
tl;dr: Too afraid to talk to old friends because afraid it might feel awkward