What does it mean when a guy says he’s thinking about you?

I’ve been talking to a guy for about a month now. We talk every day and he’s very consistent but a few days a go he just randomly told me that he’s been thinking about me. I asked him what specifically he was thinking about and he just said that he was thinking about me? What does that mean? Or what kind of hint is he trying to drop?
What does it mean when a guy says he’s thinking about you?
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