AITA for not allowing my roommates boyfriend to come and go as he pleases while she is away on vacation?

A small backstory - my roommate and I are 26 years old and are also bestfriends for a few years now. She has a boyfriend that I do really like a lot the only thing is he is ALWAYS at our apartment. They are also on and off constantly for about a year now. I have never heard her say they were actually dating before this situation. He lives at home with his mom so I always gave him the benefit of the doubt and never said anything about him staying with us every night (even though he obviously doesn’t pay rent) and have overall been very lenient with the situation. She also gave this man a spare set of keys to our apartment a few months ago???

So onto the story. My roommate was leaving to go on a 12 day vacation in a different country. As she was leaving to go to the airport she said to me “Bye! My boyfriend will be in and out throughout the week” I said “What? Why would he need to be here” she says “To feed my cat”.

Now I should also mention, I feed her cat most nights anyways since she works night shifts and I work day shifts. And I was also planning to be home the duration of her trip so I am able to feed and give her cat attention. I also have cats so we are both very used to caring for all 3 cats.

I told her no. He can’t be coming in and out of the apartment while she is not here because it’s literally just weird and pointless since I am caring for her cat……what other reason would he need to come over? She went on to say “Well i just don’t see the issue if he’s just in my room.” Okay so he is not just coming over to feed the cat then - he is coming over to hangout in your room. I say “No” again and she rolls her eyes an leaves.

Now this is the part where i might be the asshole. I sent her a text afterwards and said “Just to reiterate, I love him but there is just no need of him to be here while you aren’t. Also, it’s already weird that he has a set of keys when you guys aren’t even dating.” To which she replied that they are dating. I said “Yeah every 2 weeks dude”

Me saying that made her call me mean and rude over a series of 3 or 4 texts and now she is really upset with me and we haven’t spoken for a week. I did apologize and say I didn’t think that would make her so upset. We have never had a fight like this before and would like to know if I’m in the wrong and should make more of an effort to apologize again. AITA?