I hear you, and I can certainly relate! I've tried post-secondary school on two occasions and had to drop out early both times. Right now I'm on disability and working a part-time cleaning job.

I know it sounds corny, but sometimes it helps me to think about what is going right in my life, rather than what isn't. Even if it's something that seems small. For me it's my boyfriend, my family, having a job, and my cat Joker. :P

Hang in there!