I am a student and live with three housemates. We have a friend staying in the lounge for a few weeks. One of my (official) housemates is having a band to stay tonight as his band is playing with them, and months ago he offered them the lounge. This is obviously now not available. I said weeks ago he could give the band his room, stay in my room and I'd stay at my boyfriend's. I have since split with said boyfriend. AIBU to not give up my room even though I said I would previously?