You keep trying because there's always something to look forward to. I'm in the same boat as you: wanting to give up because life sucks. I like to dream about what I could become. I dream of a good life, becoming a famous author, creating something in the medical field that's needed by thousands; millions of people. Or maybe not even job success. Like maybe I'll have a family or even a spouse like a girlfriend or boyfriend. I just go one day at a time, one hour, or minute. Even though I feel like I suck and hate myself and think there is no hope to me, but deep down somewhere inside, I know things will. Hope you feel better.