I need a bit of help...
Hey Shiza. I, myself, have struggled with those same feelings. It's really hard and debilitating to feel exhausted and constantly on edge. I know that things feel hopeless, and life can be kind of a drag. However, from personal experience, all I can say is that you need to persevere for the sake of the endless potential your future can hold. Yeah things suck now, your step dad is a dick and your being belittled by assholes. But that's the keyword here. They're effing assholes. They take joy from your misery, and that type of person is probably the most miserable inside. The fact that you recognize they're dicks is enough in itself to choose to ignore them. Which is hard. But you're better than them, and you and I know that. As for your friend, who's suicidal, there's only so much you can do. Be there for them, but don't suffer. Remind yourself that there's only so much help you can give, and you can't allow yourself to feel miserable for not being everything they need. Depression is a steep, disgusting thing, and it's not something that's simple or easy. So you can't do everything, you're not superman.