I hate my life.

My family says they try to support me, but I clam up around them; their judgmental nature is too much for me to bear. I am afraid to share any detail of my life with them, as they inevitably use it against me.
In my offline life, the only thing close to "friends" around me are people who actually know what they want to do with themselves, know how to get there, and know how things will play out. Meanwhile, I have no idea what I want to be doing, or where I should be. "Oh, set goals, do what you want!" is the universal creed. But how are you supposed to do what you want when you don't know what you want? But how can you not know what you want; you've had twenty-one years to figure it out, haven't you?
I'm also trapped in poverty. Just this past week, I've had to spend $180 on two textbooks for school. That's not counting the $75 payments I have to make each month, from August to November. (Used to be just $50, until the tuition hike; thanks, shitty California budget system!) Then my parents told me they've dropped my car insurance, so I have to buy my own. (Not that I feel I shouldn't, they just had the greatest timing on their part.) Couple that with a job that provides erratic hours at best, and I can't afford to save anything.
Speaking of school, I've been swamped with work. Art class, a class I thought I'd have fun in, is taking a serious emotional toll on me. My online sociology class has just proven one thing: I hate sociology, and now the only thing keeping me in the class is that it gives me full-time-student status. My online career planning class so far hasn't taught me a single thing that hasn't been repeated to me countless times before.

...I don't know what I'm trying to say here; I'm just completely down on my life, my present, my future. It's only other anonymous pseudonyms on the internet keeping me from wishing for a permanent way out. Pretty pathetic, huh?