One of My Residents wont speak to me (Long term care)

So just wanted to get some opinions on this situation:

I work in long tern care and have one Resident who is completely cognitive and is usually always joking and talking with me when I come by to do the evening med pass. Yesterday when I can by he was very very quiet. He just took his meds and said nothing to me, wouldn't even look at me. I asked him if everything was ok since he wasn't being his normal self. ( I was thinking maybe he was sick, or something had happened) He then tells me "Well you are not a very good nurse if you don't know whats wrong with me" I told him " I am sorry but I really don't know whats wrong, you will have to tell me" Still thinking I had missed something since apparently now I am a "bad nurse". So finally he comes out with it. He says " I didn't appreciate what you did last night". I was still clueless as to what he was referring to. Then he tells me it was because I asked him to leave another Res's room the other night. The situation was this: I got a call from my care aide that one of the other Residents had fell on the floor in their bathroom (off the toilet) and hit his head on the floor. So I came flying into the room with my vitals kit and dressing supplies. This man was entering the bathroom of the Res who was on the floor. I asked him to please leave and that I would see him later. He wouldn't move so I told him " I am sorry but this is an emergency and you are really going to have to leave" He then left and I dealt with the poor guy on the floor and I never really thought about it again. Until I came on the next day and this guy won't speak to me. He told me I a terrible nurse for doing this and that he is not talking to me again. He won't even let me check his blood sugars. I apologized to him and told him I am very sorry if it came across rude but that in emergency situations we can not have other Residents coming in the room and that the Res on the floor also needed his privacy. He tells me "well maybe you should start thinking more about other people" I told him I am very sorry but in that situation I am thinking about the poor gentleman on the floor, and it would be the same if it was him. But nope he wouldn't accept any of that. He still won't talk to me 3 days later and won't even look at me..... I don't know what I did wrong.... Was it so terrible what I did?? What should I do now?????