Having communication conflict with my boyfriend?

[xoxo625]

My boyfriend is in east coast time and im in west coast time. Today, he called me while I was taking my blood pressure. He had a bad day and wanted to talk about it. I didn't give him my full attention because I was taking my BP. I was listening to what he was saying but didn't offer feedback because I was still to get an appropriate result. He got very upset because he said all I have to say is hah, or awww. We had an argument over it and hung up. As soon as I got home, I signed up to IM with him. I apologized but he didn't want to talk about it. He asked me to drop it, not to apologize or argue. I said ok. Before he headed to bed, he called me but decided to discuss what was bothering him. I didn't want to discuss because I knew it was 1am for him. But he insisted. He complained that he can't talk about certain topics with me, he said that I don't seem engaged in convo. He also said that I don't ask about the important things (important to him). He had been working on paper for school, so I asked how he did (if he finished) and he said that was not important and doesn't see why I should ask about it. He went on saying, “that im not with my friends and should not treat our convo as if I was with my friends”. I asked if he felt that way when he was physically here with me and he said “ I don't think so, if I did, I would have mentioned it”. Then went on asking if I'm being myself? If who I have been in the past year and four months was only to make him like me? Recently with him, if I ask, I did wrong, and if I didn't I did wrong as well. Apparently I have not been discussing topics that have real content? Because he's not here, I talk about my day, my hobbies (while he's gone), school, my emotions and troubles. I do because I want to keep him updated. I ask about his day, school, work, I'm constantly asking. I can't help to feel stupid and I know I should not feel that way. I don't know what to do. Sometimes if I say im hurting, he finds a way to turn it around and make it seem as if im being inconsiderate and selfish. What would you do?