For context this is in a dorm at college. I had just been sitting in my bed on my computer messing around since I had free time for once when I got a text from my roommate. 

He was really asking me to leave in the.next 30 minutes so him and his girlfriend could have alone time. I told him no since i had no other plans and wanted to relax. He then said I guess you'll be in there while we're having sex( they really did it too). I told him he should have planned it out beforehand and asked. 

He told me not to be a "smart ass" or we'll have a problem. So he threatened me for saying no.Basically after that it caused a whole arguement etc. He now treats me like I'm the asshole who did something horrible cause I didn't want to leave my room on a dime like that. He just ignores me completely.