You are neither wrong — nor stupid.
Thank you for writing us here. Since you mentioned it twice that you were “chemistry partners,” I thought it would be relevant to highlight that. I think that’s what you are. You have really good chemistry — and just like chemicals that mixed together well this partnership is good when it happens. But the realities of your situation are such that 600 miles makes it difficult to have the day-to-day contact you were used to.
Right now the relationship is a very good distraction. Enjoy each other’s company, you can flirt, and feel the connection. But what is also clear is that there are no plans for following up, getting together, or trying to make the relationship work long-distance.
Honor the limitations. If you’d like him to initiate the call I would highly recommend you ask him directly. But for now work on accepting the conditions of the relationship as they are.