You (Marty) are stuck in 1955 after seeing Doc Brown get shot in 1984.

Lorraine, a young brunette girl in Hill Valley, starts to fall for you, not knowing you're her future son. You cannot tell her since it will effect the future.

sitting on the bed, Lorraine makes a move on you, and you feel the urge to give in and attempt to fight it, knowing the risk to the timeline.

Sitting on the bed, Lorraine leans in close and whispers: "Isn't this all kind of... exciting?"