A first meeting can be good without promising that it must become something more.

Enjoyment gets converted into expectation almost immediately. A pleasant first conversation raises the question of what this is going to be, and that question can spoil the thing it asks about, because now both people are evaluating a future instead of having an afternoon. Some encounters are complete at their own size, and treating them only as a beginning undervalues them.

Let the next good first meeting be exactly that. Enjoy it, say so honestly, and leave the question of what follows to whatever actually follows.