How did socially anxious/awkward people date before dating apps?

Trust is really important. That's why I submitted a question a while ago asking when I should "come out" about having OCD. So many people assume that it's excessive orderliness or cleanliness, so bringing it up without proper context makes me look like I'm trying to make drama where there is none. The reality is that OCD, or at least the way it exhibits for me, is more akin to schizophrenia in that I can become solidly convinced of things that simply aren't true. Having THAT happen without previously having prepared my partner for what to expect is even worse