Cutting out social media does not make someone feel lonely; on the contrary, social media makes you feel lonely, and you are so addicted that you don't even realize you are lonely. Try this: put your phone down, get out, go to a park, walk down the streets; you will definitely talk with some people and even play with people. Then go home, take out your phone, and spend the whole night on social media; only then will you realize how lonely social media makes people feel where you don't really appreciate the people who are next to you and go to the internet, which is mostly, though not always, an unsafe practice to do.
Also, because on social media, people tend to text more than they actually call someone and talk, it actually affects their mouth muscles, as they don't use them that much.