I don't want to scare you, but I hope he didn't get your license number, and Im not sure if just anyone can get info even if he did.. but that sure sounds creepy. you should have said that yes you called your husband and hes on his way...you can never be too careful, and gone to the store to ask for help, and I agree with Barbara, he could have done something to your tire then conviently been there to help, but as you said your tire had a nail in it..
anyway, be careful, and don't feel like you have to answer his nosy questions, its one thing to make polite conversation, but another to ask so many personal questions then ask you out!
be careful! Ive heard you should always go with your feelings, if it feels wrong, or the person makes you feel creepy, then you should go with your gut feelings.