What should I do?

Let me just put this out there, some of your friends can be real bitches. I have or had a friend called Jailee and she was acting really bitchy today and had a bad attitude over nothing. And I have this so-so friend named Kelly (ALL THESE NAMES ARE FICTIONAL) and she was being the definition of an asshole today. She kept calling me the b-word and tried to dig her fingernails into my flesh. But don't worry I didn't bleed. But to be honest I only hang out with them because I feel bad for them. My friends in my friend group only hang out with them out of pity because they barely have any other friends in the school. And people talk bad about them behind their backs. So I wanna drop them, but I feel like I can't. I feel kinda torn so what should I do? Comment what I should do below. (That sounded like YouTube lol)