He copies me on social media?

He and I are friends and we both have Twitter. We're both aware that we've got Twitter, but we don't follow each other. But, I'm getting the feeling that he stalks my account at times, as do I.

I noticed that when I had Retweeted a person's tweet and then retweeted another tweet coming from that same person again in a row, he had done the same thing afterwards. I figured that it was all just a coincidence. But on the next day, I had retweeted a post about a fantasy game and then he retweeted about the same thing on the same day. Out of all the other things that he could have retweeted, he chose that topic. Then the following day I had made a "retweet with comment" on a person's post and had done no further activity and then he had done the same thing on his account and had posted nothing else. Why is he copying me?
He copies me on social media?
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