help me please

so on Tuesday night I went over my friends house so that his roommate could help me with my hw. He came home from work and everything was good he went to bed, his roommate and I went upstairs to check out his room I sat on his bed and by the time he went back downstairs and came up I was asleep. I ended up staying the night. I only kissed the roommate. However my friend never told me that he liked me or anything along those lines so idk why he's mad. I don't know what to do.