How to maintain a very new connection online?

I’ve just started talking to a guy and we went on one date which was really nice, but now I’m going away for a month and I’m scared our connection will fizzle out.. I want to try to maintain the contact but I don’t want to be too demanding. also I don’t know if it’s realistic to think that he will be willing to wait, when we just had one date.. any advice on how I could act in this? Thanks
How to maintain a very new connection online?
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