"Ever heard of Facebook envy? If you're a Facebook user, chances are you've experienced it. As it turns out, Facebook tends to make us lonelier and less happy. Researchers from Germany found that people who frequently use Facebook suffer from a generalized idea that other people’s lives are better than theirs, largely due to a sharing bias. In other words, Facebook users are more likely to post pictures of a luxury vacation, while things like funerals, divorces and the doldrums of daily life go undocumented. There is one caveat, though: Facebook envy most often affects "lurkers" - those who read a lot, but don’t write a lot. Other data shows that posting can be therapeutic and that the most active posters tend to feel happier and less lonely."
http://www.techopedia.com/2/29648/personal-tech/gadgets/5-weird-ways-technology-is-changing-our-behavior