I get asked this a lot. And it can be complicated but for the most part, cut the ties. This doesn’t have to be aggressive and you don’t have to Block them on FB, just unfriend him and you can even have a conversation with your Ex about it first if you are on friendly terms. But like any break up, you don’t need constant reminders of what they are doing, where they are going and whom they are hanging out with. This can be painful. Do you really want to see that he checked in at your favorite sushi spot? I know some people stay connected with their Ex on facebook because of the kids. I’m not sure why, though because the kids know you are divorced. When I go on a trip with the kids and there are some cute pictures that I want to share, I also text them to my Ex and he does the same.
Now, what about his mom/siblings/friends . . . Yes, its even more complicated now. It really does depend on your circumstances and your own relationship with each one of these people. Were you married for 20 years and really became close with your Ex’s mother? Then keep her, your relationship (in social media & in real life) doesn’t have to change. During your mourning stage, if you think there are going to be posts from others about your Ex and you really can’t handle it, facebook has a “hide posts from this person”. You are still friends but their posts are hidden in your feed. When you are up to it again, you can just change the setting back. You can also take a social media hiatus — this is a good thing to do from time to time and can help you focus on yourself.