What does it mean when a guy says let's take it one day at a time?

Complicatedquestions
I've dated someone a month we've really been hanging out enjoying eachothers company already intimate , we live in separate states and then I recently asked how he feels about us , he shyed away from the question. And replied let's just take it one day at a time. I would have liked a real answer that wasn't so vague so I could see if I'm waiting my time or not considering we live so far away
What does it mean when a guy says let's take it one day at a time?
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