A way to freak him out is to pursue him vigorously.

A way not to freak him out is to leave him alone and see what if anything develops.

Another way to freak him out is to try to pin him down right away on what he is looking for. How can he know what he looking for with regard to you when he has only met you once?

A way not to freak him out is to just let the relationship develop or not develop naturally, and not try to define it before it can be defined.