"Close" and "near" are commonly used as adjectives. When you are talking about physical distances, you can use either word. Like this:
The subway station is close.
The subway station is near.
Both these sentences are correct and mean the same thing.
But if you are talking about something that deals with abstract ideas or qualities, like relationships, you use "close" instead of "near."
As in this example:
My friend and I live in different countries, but we are very close.
Here, I am saying that my friend and I are not in the same physical area, but we are emotionally connected. We are good friends.
However, if I say, "My neighbor and I live in the same apartment building, but we are not close," I mean we occupy the same physical area, but we are not emotionally connected. My dog tried to bite his dog once, and he has never spoken to me again!
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