Is NOBODY wrong in the post ? POST : I’m sorry for any mistakes, I’m not from an english speakibg country.

Me and Zoe(not her real name) have been best friends since 10th grade with another girl, Ana. 
Me and Zoe moved to another city for college( different colleges but in the same city) and we’re actually roomates, while Ana went to college in another city. We still have our group chat where we keep in touch. 
Since the first months I’ve noticed that Zoe is starting to change a little bit but so was I because we met new people and had different experiences. However over the past like 6 months she’s been drinking heavily and goes clubbing all the time and comes home in the morning and she is really obsessed with impressing other people. She even started smoking occasionally which I know for sure we have agreed that we absolutely hate. 

She also once tried some drugs and at that point i wasn’t even trying to say to her to be careful because she wouldn t listen anyway. Also she had a FWB situatioj with a boy that almost all her friends disagreed and she also slept with him while he had a girlfriend and she admitted she wasn’t feeling guilty at all. At this point i was unfortunately kind of disgusted with her because i absolutely hate cheating, but I havent expressed any of this feelings. 

Also me and Ana the other friend from our trio have agreed that she has changed a lot and she feels that she s really kind of an aquintance rather than a friend. 

While i understant that in your 20s you grow up and kind of discover yourself but this seems like too much and a very drastic change and i really cant help but judge her and try to ignore when shes bragging about drinking and other stuff so that i dont encourage it. 

Also our relationship kind of became sour and she definitely doesn’t really want to hang out with me and our other roomate (who is actually her cousin) even if we invite her. It feels like living with a stranger. 

So AITA here? I cant help but feel like one because she was my bff and it feels like a too drastic change and i dont recognize this person she has became but at the same time i feel i should just shut up and support her like a real friend would do. 


Tldr: my bff from highschool had a really drastic change in the first year of college and i feel like shit for judgeing her when maybe i should support her because maybe she s just discovering herself. 