Did I break girl code by telling a guy his gf was cheating

So, I am a girl in the last year of middle school and there is this girl, M who is in a relationship with E who I sit next to in math class. For context M is a snake like if u ask her for a pad around guys she yells "OH U NEED A PAD" and does not even give you one, if you make the mistake of telling who your crush is, he knows + the whole school, if she bullies and you vent to your friends she will victimize herself somehow, oh and also she reposts tiktoks about being bullied when she is really popular bc no one wants to start drama and risk their reputation(bc she starts fake rumors) so basely to her, girl code is something every girl has to follow besides her. Anyways I overheard her talking about how she is cheat on E with a guy in Albania (that is 19) by texting and when she goes during the summer they will go on dates and stuff. There 2 things wrong with that 1. he is 19 2. she is cheating, but 2 doesn't really matter bc its middle school. So, one of my friends told the counselor about the whole dating a 19 yo. Anyways I felt really bad bc E is a really good friend and she wanted to dump him in the middle of summer over text with a picture of her kissing the other guy who 6 years older (but he is way more mature and most likely has the wrong intentions like why are you dating a 13 year old at 19) so i decided to tell him and he start yell "IMMA BE SINGLE AND READY TO MINGLE" the teacher was out of the room. Well while he was yelling that her friend who was behind ur must of heard. The next day M started yelling at for breaking girl code I just walked to the bathroom and had a minor anxiety attack until my friend texted me that she left. I feel really bad, so guys did i break girl code?