Why a guy would fist bump me?

I'm new at the office and a co-worker was the first one to make friendly conversation with me, after that every time he sees me he says"hi, hey, what's up, etc" sometimes we have small talk because he bump with eachother but today, he was leaving and told me "I'm leaving, have a great weekend " and fist bumped me. I was so confused! that I waiwed goodbye and then fist bumped him back. Does he likes me or is giving me the friend zone signal?
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+1 y
Well I thought he liked me because he doesn't say (hi l, hey, how are u, etc) to every person in the office, plus he makes eye contact every time he can. But I guess I was friendzoned Today! Lol
Why a guy would fist bump me?
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