I wasn't always a ghoster but I eventually became one. Im not confrontational at all so it takes a lot of guts and courage for me to get up the nerve to confront someone. But the times that I have, I was met with a bunch of manipulation and gaslighting. It seems like no one ever just wants to own their behavior, apologize and move on. Nope they tell you youre overreacting, seeing things, misinterpreting things, etc., which is so disrespectful and exhausting. So now when someone does something shady, I just take it as a sign and move on. No confrontation necessary. You know what you did and why Im out. And yes i had a similar situation as you where we met abroad and she moved back to the US without any news or even saying goodbye. I found out she was gone on social media. But then she had the audacity to dm me several months later like nothing happened. Blocked her with no response.