Spaceid: You might try to explain how you feel to him or else when you bring up deep topics, you might want to just take your time to find your feelings and express them. How he reacts might tell you a lot about his personality.

As far as the car situation, It'd be good to consider that his mind may have been scattered by being in the high stress environment of traffic. We are all affected by our environments and situations and we need to make sure we do not treat every action as indicative of someone else's personality.