What did I do to make him so upset?

Today my boyfriend and I were having sex and he had slipped out and went to go put it back in and when he went to go put it back he said okay then stopped and looked so mad at me. He was still hard so I know it wasn't anything he did. Then he got up took some water and laid down then he looked at me and asked me how I feel about him and I said I've him because I do. Like why was he questioning m feelings for him?! Then he was upset still and I started to fall asleep and I could tell he was somewhat crying cause when he cries his whole body shakes. What could I have possibly done during sex to make him think I don't have feelings for him.