What are possible reasons you accept your workmate follow request but didn't follow back?

I get along with all my workmates and am always trying to cheer them up. I have made him laugh before. But he is the quietest workmate and he doesn't try to engage convo with anyone except those from his country. He follows back workmates from different countries though all who also follow me. It was today I sent the request and he accepted. I'm wondering if he doesn't like me 🙃

If you did what he did would it mean you dislike a person? And why let someone you dislike follow you?

What are possible reasons you accept your workmate follow request but didn't follow back?
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