Social, or anti social media?
Many media tools are designed for online mingling, but are also equipped with features that make it easy to ignore your contacts.
Twitter is an example: Click on your former friend’s profile, then click the gear symbol and scroll down to select “mute.” These tweets will disappear from your feed, but they will never know about your action. Facebook has similar options for secretly tuning out specific friends.
Instagram is among the services that do not make this easy, although there are third-party apps that claim to let you filter your feed.