Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: TL;DR at the end
So me and another friend have an AP history class together. The class was supposed to be run by teacher A, but he had a medical emergency in December, so now we have a sub for the rest of the year. Teacher A was decently obese(hence the med emergency) and his tests were online-only, meaning that pretty much half the class had separate documents on a device to cheat off of. 

So the new sub comes in(teacher B), and she’s pretty laid back. She lets us sit wherever we want and her class is pretty chill, so naturally me and my friend always sit together. Her tests were ALL fill in the blank and multiple choice. This is important because my friend had maintained his A grade the whole year cheating off of a separate word document and now needed other means to get his grades. This meant that now he was always cheating off of me during formal assessments. I didn’t really have an issue with this, but now he asks for answers from me all the time. It’s getting quite annoying to be honest. Teacher B doesn’t really care about the cheating(as I mentioned before she’s very laid back) and I feel as if my friend is using me. We’re very close, but I feel like I’m about to reach my breaking point. I don’t like being taken advantage of, and I’ve tried discussing this with my friend previously but he’s brushed it off. This has made me feel that he doesn’t consider my stance on this and only keeps me as a friend just for the grades. However, we have been great friends for a while so I think cutting him off might be going too far but it might have to be the best option. WIBTA if I did this?

TL;DR 
Friend in history class cheats off of me all the time, despite me requesting him to stop. We are very good friends, but I am considering cutting him off. WIBTA if I did this?

cutting off a friend who regularly cheats off of me