Why is the internet feel sadder than real life?

I always get this messed up feeling in my heart with the internet. The feeling you get when a friend you made on the internet eventually has to step away from it to live their lives and you do too, saying goodbye to the ones you have confided to for years. Growing up in this place only because your parents were never there for you or because people in your neighborhood just felt so unreachable or they couldn't reach you. The internet feels like this little paradise and it is just that. A fantasy. Real and unreal at the same time. sigh