Is he flirting with me?

I work with this guy, who I secretly check out when I know he isn't looking. He always comes to my lane and stares at me with a smile. I'll ask him "what?", and he'll say "oh nothing" and walk off with a bigger smile. He's always around me, one way or another. When work is over I'm usually by myself towards the front, well a few days ago he walked from where he was (on the other side, might I add), stared at me clutching his phone and eventually walked off. Then yesterday (a day after that happened) he was in my spot, where I sat since day one! I was like "hey, you're in my spot" and he's like "oh well, it was my spot first, I used to sit here and I didn't the other days because it was cold". Bull! I been there for almost a month, I'm out way after him and he says he "always sits there"? Hahaha. Today, on break him and his friends sat a few tables away. He walked by me, I glanced up to see who it was (surprise it was him), I looked at his table and all his friends were staring at me. So I awkwardly ignored them. Then he walked back by me to go back to his table and stupid me looked up again to see who it was! Only to look at his table with all his friends staring at me again and smiling. Does that mean anything? He always talks to me too. But supposedly word around the other people, he was dared to ask out someone higher up. He hasn't and doesn't want to, though they talk. I'm so confused!

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