Say you were in a casual relationship with a girl and she told you that she wanted more and her feelings were involved, would you continue to have sex with her if you didn't feel the same way? Even do things that will give her the impression that you wanted more (like caress her cheek, still call her pet names, kiss her during sex, and say things like "I'm being intimate")?
He's never caressed my face before.
He's never kissed me during sex before.
Now when I threatened to leave he's doing new stuff.