How do I know if my talking stag is going well? How can I keep it interesting if the guy is 6 hrs away? We call and text but what else?

We plan to meet in about 1 month but until then how should I progress things? He seems pretty interested and we have met in person once and it went very well

How do I know if my talking stag is going well? How can I keep it interesting if the guy is 6 hrs away? We call and text but what else?
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