Where did my life go?!?!?!

I was reading a dear friend of mines blog today and realized that i'm not me anymore. I'm no longer full of life and happiness. So where did it all go?!?! Have I really become this shell of a person that doesn't even really look like me anymore? I know that time marches on after things happen and that I can tell because it has marched across my face. I don't know what to do anymore, where to turn or who to talk to. I just wish I were me again.