Will a guy continue the conversation even if he's not interested?

I message the guy I like over Instagram anyway if I ask him a question he will Always ask the same back for example if I say what are you doing in the school holidays he will say blah blah then will ask what I'm doing or if I say do you like this movie or subject he will also ask if I like it. He keeps the conversation going is he interested or just being nice?
Will a guy continue the conversation even if he's not interested?
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