Hey Darkenedsky,
I can tell you that yes, i have felt just like you for about two years now, but just recently I was oficially diagnosed with depression when anxious, disturbing thoughts led me to visit a psychiatrist. I can totally relate to your description of life as a flat road. There were some days when I just felt like a zombie. The moment I started seeing soeone for help and released my worry, I started to feel better. Times are still rough though. I am delighted to tell you that you are definately not alone.
Best of luck, and all respect,
The Wobbitt