My old coworker I dealt with for just under a year, who texted me non stop about everything then suddenly ghosted me and quit work suddenly, PM me on Facebook today. At first it was a generic “hope all is well.” Then she sent me a picture of a Starbucks drink she got. Since we both like Starbucks. At first I was annoyed that she was PM me after stopping contact 1.5 years ago. But then I figured she’s just trying to be nice and is probably pretty insecure. But I am not one to get sucked into these types of things with people so I politely responded to her message and then just left it at that.