Co worker liking all my photos on Instagram?

Hello! Just a quick question. I have only 6 photos on instagram. First posted from 2014 and my latest one was from January 2017. This co worker recently followed me on instagram and literally liked all 6 photos. even the ones from 2014. Should i think anything of this? Sorry if im overthinking
Update: I should mention i am a Male and my co worker is Female
Update 2: Also, does this mean she may like me or something?
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