<human>: Could you distill the essence of the text into 1-3 sentences?

Today I woke up from a late nap and my boyfriend was laying in bed with me (he was on break from work). I sleepily asked him "whatcha doing?" and he responded "Thinking of all the times you were mean to me".  
I was confused by this (I still am), and asked him why he was thinking about that and what started that train of thought, but he wouldn't answer.   
I left to take care of something, and when I returned, he was still laying down. I asked him again and he playfully said "hush" and told me not to worry about it.   
It's out of nowhere because we haven't been fighting and had a great night last night, filled with daredevil, snacks and cuddles.  
Now I'm upset and he's at work, messaging me, asking me if we're okay and telling me it was nothing, he's sorry he told me, and that he loves me. I haven't said anything back because he's at work and I don't want to start an argument while he's working a double. I just don't understand where the hell this is coming from and if I should be as upset/offended as I am.
<bot>: out of nowhere, bf said he was thinking of all the times I was mean to him while I was sleeping and I dk wtf to do/say