I don't like my friend anymore...?

Okay, so my friend and I have a lot of problems. We'll call her Pinky. It all started in 4th grade, 5 years ago. Back then, she wouldn't let me play with any other people. I told her that she wasn't my only friend and that I was going to play with my other friend that day during recess. She flipped out and didn't talk to me until 7th grade. We hung out sometimes in 7th and 8th grade but we weren't very close... i made sure of that because of what had happened. But now I'm in 9th grade and she got clingy to me again. I was sick all of last week and was in the hospital so I didn't know that she was sick on Friday so she didn't go to school. We had an exam on Friday. I texted her yesterday and asked her if there were any tricky questions that weren't covered on the study guide. She, once again, flipped out at me because apparently, she told me she was sick. She said I wasn't the only one with problems and that the world didn't revolve around me and that she's done people pleasing her way around me. But Pinky is the self centered one. SHE'S the one who thinks the world revolves around her. I didn't text back and I'm not planning to continue speaking to her. Should I confront her tomorrow and tell her that this friendship is over for good or should I just stop talking to her? Sorry that its so long...