<human>: Summarize the given text in a few sentences.

I work full time and I'm in grad school full time, so my home time is calming, despite how limited it is. However, my roommate started dating this guy **3 weeks ago** and only asked once (not even this week) if he could crash at our place over night. It's a small apartment - just the two of us - so it makes me feel extremely uncomfortable He's a stranger to me and there's only been one time I've been home in the last week that he wasn't already at our apartment. I feel like I'm constantly third-wheeling and I don't feel comfortable being in my apartment while he's here because I don't know him at ALL. 

Part of the reason he's here all the time might be because I'm so busy and I'm either at work, at class, or at yoga, but I really shouldn't feel anxious coming home because I don't know who is going to be there. And apparently they're always here because he's married in a green card marriage and he lives with his wife. (Which I guess isn't my place to judge, but it's part of the bigger issue.)

I'm trying to figure out how to talk to her about it, but she is extremely easily offended and will be pissed no matter how I approach it. I've already texted her one day asking if he was going to be there because I had a lot of work to get done, to which she responded, "I'm not sure if he's planning on coming over later..."

Help?
I guess I'm wondering if my feelings are justified or if I'm blowing up the issue to what it shouldn't be. Any ideas on how to approach this without coming off bitchy or in a way that she can't frame it like it's my fault for being uncomfortable (which she's likely to do)?
<bot>: Roommate's brand new boyfriend I don't know is here every night and doesn't ask me if I mind. How do I approach this?