On mobile so my apologies for any mistakes. 

Bit of background, my girlfriend and I are in college and she has moved in with me for almost a year now, and we’ve been dating for two years. I share my apartment with a friend from high school ( each with out own room), but he’s chill with the situation and gets along with her too. There have been no problems with the situation so far, but she does have her own apartment which she doesn’t really use. 

Recently we both came back home for spring break, but she went back earlier than I did. I let her keep the keys to my place so that she could sleep there and cook and well chill, I get in 2 days after her with my roommate. This has happened before where I let her live at my place for a bit without me and it wasn’t an issue. Last time she also wanted to have a friend over and had asked me with a good amount of time letting me know. I wasn’t super happy about it, but it was about a week without me and she said she got lonely so I complied. And I would just prefer she used her place to hang out with her friends which is like 3 blocks away. 

The issue came this time when because from what I can tell she was at my place and asked her friend to move her stuff to her apartment to make extra space in the closet for her summer stuff ( we share my closet she was moving out winter stuff for summer stuff). In the moment I wasn’t made aware of that, and I assumed she was alone. She left the apartment to pick up some things and came back saying things with “we” and I was confused thinking she was alone. So I asked and she said she was with her friend. Then I asked if she and her friend were going to chill at my apartment and she then said yea if it was ok with me. I then told her that I thought it was a bit weird for people to be at my place, but since her friend was already there then they might as well. They hadn’t moved her clothes or anything just gone to pick other stuff up from nearby. 

My girlfriend was upset by this saying that she mentioned her friend helping her, but she hadn’t mentioned when or that they were even together. I was more upset that she was inviting people, and I was the one that asked if they were hanging out at my place before she even mentioned it. She ended up sending her friend home and getting really upset saying that she wants to move out because I don’t make it feel like her home too. In reality I know it’s not a big deal if her friend had stayed to chill but I would have liked a bit more of a heads up than me asking if she’s alone when in reality her and the friend are already driving to my place. 

So AITA for getting upset 