Glioblastoma Multiforme has a 1-3 year prognosis at best. I know a few people who model treatment strategies for that disease, and it seems like a frustrating process to get anything to suppress tumor progression for more than a few weeks at best. I don't know if that is what you have or not, but obviously those kinds of diseases are hard to work with. I hope that you fight this hard and that developments in modern medicine come through for you. Man has cured HIV recently (though accidental), so I would keep the faith that you can be the next recipient of good fortune.
http://www.webmd.com/hiv-aids/news/20101215/hiv-aids-cure-faq