Why is my boyfriend being distant towards me?

I think the main cause was the fact that he thought he was being the chauffeur for both you and your friend. It does sound quite silly, but it can really get to people in severe ways when they think they are being used. Sit him down and talk to him how his behaviour has upset you, and maybe arrange a surprise dinner for him, to show that you still have feelings. It this doesn't work maybe you should break off the relationship, as he seems really annoyed by what has happened!