Board Thread:False Info and Speculative Discussion/@comment-11260666-20140326163647/@comment-6383956-20140617034946

Sterek or not -- at this point, Derek and Stiles are friends. Stiles' opinion on Derek had totally changed by 3a and Derek was absolutely determined to help Stiles (not to help Scott help Stiles) in 3b. I believe Derek might dream about Stiles as much as I believe he'd dream about anyone else.

What I don't believe is that Derek ever really had time to get filled in on Stiles' "I don't know if I'm awake or asleep" thing. There was zero indication that he had any interactions with any of them that we didn't see happen. However, this is Teen Wolf, and from the way characters often suddenly come to know things at about the same time we do as an audience, my guess is that Derek learned about it by watching the series as it aired on MTV. :P