Same thing happened to me 4th of July weekend betterm. I hardly ever use facebook, but W is on there all the time. I got both unfriended and she dropped her married status as well. Really tore me up at first bc that's her social outlet and I know she views that as her telling the world. I think the best thing you can do is just keep plugging away and not let her see it's bothering you. Think Sotto's advice is the way to go.
Starting to really hate facebook though, so right there with you on that...Hang in there brother!
Me39 M11 : T13 D9 BD 5/31/16 In House S until 6/21/17 Divorced 10/5/18