I am doing my blog through Google's Blogger. For like 10 bucks a year you can buy your own domain on Blogger, but I'm just doing the free thing for now (my blog:
http://notanotherbeerreview.blogspot.com/). Wordpress is the other popular one, but I'm not sure how much it costs.
How would you feel seeking campus resources? I know many campuses with Psychology programs have free counseling services built in to help train prospective Grad Students.
Writing is a good way to channel energy into a constructive outlet, but I can't say how therapeutic it is. Look at all the insanely talented musicians and artists; most of them were really messed up. Now look at how many of them OD'ed or killed themselves.
Opening up is a good first step, but you may want to think about doing it in a supportive environment. There are a ton of good LGBT resources out there, so don't think you are alone.