I have the urge to not clean my friend kitchen after what he did to me.
Why did you choose to do this?
He pissed me off, he's always so dirty!
I understand he upset you, but if it's something that you told him you would do you should stick to your word.
I just can't stand being around him.
I understand his appearance and the way he takes care of himself is offputting. But instead of breaking a promise, I would have a conversation with them and let them know about what is so offputting about him.