I can’t believe he said I did this!

Okay ladies. Long story short. My boyfriend and I had his nephew over last night and we all had some drinks. Well my boyfriend fell asleep before us. His nephew and I was up talking and laughing about things. He was in one end of the couch and I was on the other. Somehow I get a text message from my bf this morning saying I was cuddled up next to his nephew asleep on the couch when he came out to go to work. I have absolutely NO MEMORY of that since I woke up in the bed. I must have fell asleep next to him but I don’t recall. I do not look at his nephew like that! He calls me “aunty” for goodness sake’s! I had absolutely no business being curled up on the couch with him, so I don’t blame my bf for being pissed off. At the end of the day if the roles were reversed i would have been furious! So I guess what I’m saying is how do i handle this?? I am so mad at myself and yet I know I didn’t mean anything by it. I don’t even recall this. What should I do??

Update: So I end up speaking to his nephew last night when I ran into him at a spot I hang at. Turns out NONE OF THAT EVER HAPPENED! Apparently, I was stretched out on one edge of the couch, and him on the other. He swore to me that nothing ever happened and I was not cuddled up with him!! I am SO ANGRY that he (my ex) made that shit up. I was LITERALLY apologizing and feeling guilty about some shit that never even took place!!! Like, wtf??!!!!