I think I'm going to end a friendship.
Why do you think that you need to end a friendship?
I have found myself better friends
You are allowed to have more than one friend. Also, if it is going to hurt them, you should find a kinder way to end the friendship.
I don't care how they feel about it honestly.
You should consider how it would feel if things were on the other foot and they were ending their friendship with you. You wouldn't want them to end it on a bad note, would you? You should try to at least end the friendship civilly.