how evil is serena? she knows that sky still loves boyd and she should be able to tell (cos i can) that boyd still loves sky but she decides to go with him and on todays episode (which i watched before on my dinner break) its the school formal and serena tells boyd she wants to go all the way with him, however by boyd's expression he doesn't and all night he was looking at sky.
anyway in the end boyd dumps serena and gets back with sky.