I want to give up tonight

So right now it's all I can think of: I want to give up tonight, I want to let go, I want to die, I want to kill myself. Tonight. I might just try it, send a few people a message that I'm sorry, write a letter to my brother and my parents, apologizing for being such a shitty daughter and then, when I'm done, just take an OD. It'd be fine, who'd care? I really wonder. And what if I'd survive? Would people show me how much they cared? Did anyone care at all? How'd my parents react? Oh well, they'd be happy if I died, and if I survived they'd yell at me, not just because I tried to kill myself, but because I failed. I'm a failure, I really am.
I want to give up tonight, I really do, I don't see any other options...