Is OTHER wrong in the post ? POST : Sorry if my formatting is terrible, I’m on mobile. 

So I live on a college apartment-style dormitory, where I live in a two bed/two bathroom with a shared kitchen. I’m living with a roommate that I’ve known since high school, but our suite mates are people in college that we didn’t know very well. In the beginning, we were introducing each other and we were cool. However, throughout the year, one of the suite mates started sleeping over at his girlfriends place the majority of the time. We minded our own business per usual, but something that he did really bothered the hell out of us. 

Every time he cooked, he would always leave a mess behind. I’m talking dishes in the sink, oily and dirty stove tops, and chunks of food left around the counter top from scraps. Not to mention that he leaves the dining table a mess as well, with liquid stains and food crumbs left on the table. My roommate and I hate this, but I was the most irritated, since I despise living in a dirty environment such as that. At first, I tried cleaning up after him, and asking him to clean it up every time he was finished. He said ok, but never followed through with his promise. Eventually I stopped cleaning his mess, and there were times where he would leave the mess for weeks without cleaning up. There was a time where he cooked spaghetti, and left the pot in the sink with sauce still left in it, and it left a wretched smell in the kitchen. 

One day, he walks in with his girlfriend. Being sick of his shit, I said in a really stern voice “[insert suite mate’s name here], can you stop being a fucking slob and clean up after yourself?! This has been going on for months. [girlfriend of his], how do you put up with his shit??” 

They just looked at me a little shocked, and then they just went in their room. I heard some arguing in their room, and she just angrily left his room. I went back into my room, and now I feel a little guilty, since I hate confrontations with people I know and I potentially could’ve ended their relationship.  AITA for calling him out in front of his girl?

TL;DR dirty roommate wouldn’t clean his dishes for a long time, called him out in front of his girl, and now she’s angry with him