One of a few things could be going on here... 1) He is not into you and he is trying very hard to let you down easy but is really driving you nuts... 2) He is gay - which I know sounds cliched - but I part of the LGBT community and this is how I behaved in the past when I was panicked about someone finding out that my partner wasn't who or what they thought she was. Its easier to keep people off their game if you mess with their heads a bit. or 3.) The guy is really super shy and REALLY socially inept. Which to me - means that either way you slice it.. he isn't worth the time or energy.

Oh and for the record, I know a lot of people that are great with their family and clients (because they are expected to) but they can still make LOUSY life companions.