Why am I so alone?

I’m nice, pretty, smart, and yet I feel as if no one understands me. The feeling has been growing and morphing into something bigger, most easily explained as a gaping void where my soul has once been. All happiness has gone from life, and all purpose. I know I need to do well in school, yet I don’t want to study. Everything seems trivial and of minute importance, even hanging out with friends. None of them really care about me, and I don’t have a best friend. I know that if I dropped dead they’d say something like, “Oh. That sucks. I can’t go to her funeral; I have a test the next day.” I feel as if I want to crawl out of my own skin and start life anew in a far, distant land, or maybe even push a knife into my stomach and end it once and for all. I know that I will never do it, but I wish I could.