Friend help

I know this is weird of me to ask for help on a illegal yaoi site but whatever. Should I or should I not drop my friend? She always plays victim in situations she creates, she "borrows" my things and accidentally "loses" them, she ignores me completely when her other friends are around and she always hits me, whenever I try to hit her back she starts screaming like a bitch. But she's honestly one of my only friends who hasn't left me yet, idk i'm like sick and my head hurts so bad which is probably why I'm not making sense