It could mean that he thinks you are a nice person and wants to know more about you and get possibly closer.
Or
He feels he doesn't what you are like very well and wants to.
However I said that to a boy one time and he replied, "What do you a want to know?"
Lets just Say I was less than impressed, as he said it in a sexual manner.
Edit: (From a selected guy's perspective) It very well could mean that he wants to be closer to you and an indirect way of saying he wants to pursue a relationship.
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When a guy wants to get closer to you, it typically means he is interested in developing a deeper connection with you. This could indicate a desire for more intimacy, emotional closeness, or a stronger relationship. It's important to communicate openly with him about your boundaries and intentions.