Why stop now?

Is it possible to have a friend that you just stop liking? I have a few best friends (my fiance, my sister, and a few other girls) but I have a couple "side" friends that I am starting to just want to break ties with. Is that mean? Maybe we're just growing apart.

You know you're not meant to be friends when:
-Hearing their name annoys you.
-Hearing a particular word that they say a lot annoys you.
-Thinking about socializing with them gives you a mini panic attack.

I want to hear your thoughts. How do I get rid of said friend(s)?

Much obliged.