Is it weird that I was naked in my BF:s bed and he didn't try anything?

Sounds like something is different. This same thing happened to me the other night, are we dating the same guy? (lol jk). Call him up and ask casually if he's feeling okay or if anything is new. If he doesn't offer up much information, leave it alone and see how he acts with you next time you see him. Guys aren't big on talking out feelings so if he doesn't offer much answers to your questions, judge it by his actions. He could be tired from things going on in his life and was just appreciating your company. Best of luck!