Can I distance myself from my best friend without judgement here?
Oh?? You honestly want to do this? Did something happen between you? Why do you want to distance yourself from your best friend?
My friend can be so mean to me sometimes.
It's okay to want space if your friend is mean. You should tell your friend that their actions hurt your feelings. It might help your friend be nicer in the future.
People deserve to be ignored or hurt if they piss me off. It's fine if they want to be jerks, they are no longer my friend.
I think you are right to have more space right now. Maybe even getting new friends might help. But knowing this will hurt them might have some concerns, please make sure things are not done roughly.