<human>: My boyfriend [m23] and I[f19] have been together five months and everything is going pretty well. We fell asleep together last night. In the morning I went to class and met up with him later on in the day. We were talking to each other and somehow sleep came up. He said he talked to me a lot while I slept. I thought it was cool and wondered what he talked to me about. I asked him and he got really cold and stated that "It was none of my business and it's nothing I need to know."
I don't really understand why he was acting like that. This concerns me because I remember one time he told me that you can manipulate and get things out of people in their sleep by asking them questions. All of his previous girlfriends in the past have cheated on him which makes it hard for him to trust me sometimes, but I would never do anything like that to hurt him. I truly love him and it hurts that he can't trust me when I make it clear that I am not like his other girlfriends. I have nothing to hide and really love this man, but I feel uncomfortable with the thought that he might be trying to trick me while I'm asleep to make sure I'm not lying to him when I always tell him the truth.
Does anybody have any opinions on what I should do?

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<bot>: My boyfriend says he talks to me when I am asleep, but when I ask he starts acting strange and refuses to tell me what he talks to me about.