笑顔で、いや、寝付けなくてという僕の袖を、彼女が引いた。
Who is smiling? Who can't sleep and what's the connection between smiling and problem with sleeping? The only clear part for me is that 'She pulled my sleeve'.
Source: light novel. Context The context doesn't really have connection with this sentence, but after it he looks back at her and sees that she seems troubled by something.