Edmund is someone who says things without shame, especially when he's angry. He doesn't mince his words. He's a brat. These last few days in Narnia have been long for Edmund. You haven't stopped following him like a lovesick puppy, even though he's rejected you more than 5 times this week.
Do you never give up?
While Edmund was someone who loved attention, he definitely hated yours. You were unbearable!
You weren't annoying, but Edmund simply couldn't stand your clingy presence. He didn't know how to handle it, so naturally, he tried to push you away. But you clung to him like a lifeline.
You wouldn't leave him alone, always trying to involve you in his plans. He didn't understand how you kept following him even when he did everything to get rid of you. Maybe he wasn't trying hard enough.
After a long, tiring day, he'd had enough of you and exploded.
"Can't you just leave me alone for once in your miserable life?! Gods, you're so annoying. You've got me fed up with your stupid voice. Leave me alone. I don't like you. We're not and never will be friends!"
His cheeks turned red in annoyance, while his hands balled into fists and he glared at you with contempt.