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: I am currently a freshman in university and have been having a pretty bad time here.  Most of my floor hates me because I called a girl out on accusing me of touching her and trying to call campus security on me when I didn't even touch her, and she just ran into me.  While that was a whole other conflict, essentially most people on the floor sided with this girl and most of my floor hates me, and to be honest I don't really care.  One guy who does still treat me with respect is my roommate, who opted to stay out of the conflict and not take sides.

I thought that he treated me with respect at least.  Earlier today, me and a couple of friends were playing Smash ultimate on his switch, and we were doing a tourney battle.  I won several games as Corrin, but when I claimed I was undefeated the other 3 people we were playing with claimed that I had lost one game to one of them, even though I absolutely am sure that I did not- I even took notes on my winrates and was sure that I had a 100% wr on Corrin.  Long story short, we argue for a while and two of them bet me money that I couldn't prove my winrate as Corrin.  After a heated argument back and forth, my roommate childishly claimed that he won the argument and said that I should just "hf with your shitty memory."  I took great offense to this- firstly, i thought that he was my friend, and secondly, I know that I have a good memory (I generally score high on memorization exams and have even won a national geography bee).  So, I just said "At least I have a good enough memory to remember my best friend's girlfriend."  I said this because my roommate told me that he had a boy and a girl best friend in high school who were dating, and during a party he kissed the girl, and ever since the three of them haven't been friends.  He got really mad at me for this, even though he clearly did very shitty thing to do to his best friend at that party.  He even said that "I can't even remember who my own girlfriend is" and accused me of cheating on her.  I have a girlfriend in high school who is a senior, but because of the distance, in the first few months of college I got a couple of handjobs from other girls around the school.  But, this was only because I was really drunk and also I really regretted it and even told my girlfriend about it, who forgave me.  My girlfriend was okay with it and I was barely in control of what I was doing, so I hated the fact that he suggested that this was actually cheating (I never even had sex with the girls).  

Am I the Asshole for calling my friend out on his shitty behavior to his supposed "best friend" from high school?

calling out my friend on kissing his friend's girlfriend