We need to start treating ourselves how we deserve to be treated, even if you feel that no one else does. Prove to the world you are worth something by treating yourself with the utmost respect and hope that other people will follow your example. And even if they don't, at least one person in the world is treating you well: You.
Things haven't always been this bad. Therefore, they won't always be this bad.
Happiness is always there. You just have to choose to see it. There's no point dwelling in the dark and ignoring the light of the stars.