What does it mean when a guy wants to sit next to you?

A guy (lets say John) who is friends with the guy who has to sit next to me (call him Bob) and they wanted to work together. John comes over and is like "No we're working over here" because Bob was packing up his things. Then John is like "switch seats" so that he is sitting next to me and Bob is in the empty desk. Why would a guy (who I have a mutual disapproval of) want to sit next to me now?
What does it mean when a guy wants to sit next to you?
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