Okay so, here it goes. My co-worker that I had a huge crush on last fall, got a girlfriend in early winter. She happened to be both of ours co-worker. When she got together with him, she made comments about how she saw me blush when I was around him, and stuff like that. Before he got together with her, me and him talked a lot, and we joked a lot. It was lots of fun. I recently heard one of the other people that work with me say that she overheard the guy I liked talking to his friend, saying "She is nineteen, how do I talk to her?" I happen to be nineteen. Now that he has been together with this other girl, he acts really strange towards me. I don't flirt with him or anything. But whenever I talk to him, whether it be for work reasons or not, he will either act annoyed with it, or he will say something that is opposite of what I said, just to disagree with me. But when he is in a better mood towards me, he will take a stapler and shoot staples at me, and he will stare me in the eyes a lot. Like I will tell him something, and he will sit and give me a weird stare right in my eyes. It's strange, but I do it back. What does this mean? Why is he acting this way? Does he hate me now for no reason? Or does he regret going with the other girl? Please help! I'm desperate, 'cause I don't know whether or not I should be mad at him or not.