To twighlight time: you clearly have no idea what this song means because her line about something being slipped in her drink is just a metaphor for how much he controls her love for him. She can't believe that its for real so she says you must've slipped something in my drink. She is afraid of what their relationship is coming to becauyse she loves him so much and although she wants to leave and end it, she can't because she actually loves him and she has this overwhelming feeling (like the devil) that stops her and whens the fight. Duh! When you grow up a little and realize what real love is like, rather then fictional books about love, you'll know (: