Robert Burton stated that nothing amplifies melancholy more than idleness. Try to keep yourself busy. It is impossible to escape memories from the past, but rebuilding your foundations will help you to resist them more and more.
Blogging annonyously to anonnymous people is not sad in any way, shape, or form. The main thing of getting something off your chest is talking to someone who will listen to you. Blogging fits that criteria and it does indeed help a lot. Most of us, no matter how vile/strange/harsh we may appear elsewhere on the site, will listen to you.