Why?

Why can't I get the courage to leave. I need to leave. I need to go away for a night. I even pack my bag. But now I'm just sitting here like a baby not leaving. What am I supposed to say if anything? Should I just walked out without a word. Or tell him where I'm going? I don't know what to do but I can't stay here and pretend everything is okay. It's not okay. And this isn't all my fault. Even though he's making me feel that way. I don't know what to do!