It's funny reading this because I'm in pretty much the same position. I joined about 9 years ago if I remember right, during my first year of university. I was also full of hope and expectation and tried really hard to change my life around, make some friends, etc. I even vowed that if things didn't get better when I finished with uni, I would kill myself. Now, I'm more friendless than I've possibly ever been, still not in a relationship and still pining over a girl I once knew many years ago, and I don't even have a job because I'm so unmotivated and living in my parents' attic.
Strangely enough, despite everything I'm definitely happier than I was then, even if I still have a lot of bouts of depression and suicidal thoughts. I guess it's true about accepting yourself and not trying to please others to fit in. All my goals and ambitions now are my own and I can honestly say that I don't care what other people think (and possibly even slightly proud of being different - sometimes, anyway).
Wonder how things will be 10 years from now though... might have to brace myself for further massive disappointment... hope not though.