According to this article, Can Blogging Make You Happier? | World of Psychology, blogging helps you feel more connected and increases your own sense of well-being. It can also allow you to express things in a public way yet that helps get things off your chest without having to do it directly.
What goes for blogging is true for things like Facebook and even Twitter, as well as other sites (like Etsy).
Read the article, and then let me know when you set up your blog. Get happy!
(Nice photo from Joe Shlabotnik’s photostream on flickr)