I hate ALMOST everyone?

I hate my life and feel cheated by it. I'm depressed and i feel angry at the world because of how bad my life has been. It's not that i've lost anything it's just that i haven't had anything good happen to me in the past 4 years. I'm 18 and have been a loner throughout highschool and i have no idea what i want.. My question is how do i enjoy life better..