Guy's Behavior

Why does he show signs that he likes me, but then avoids me?

I met this one guy months ago. He kept looking at me and he seemed like he couldn't take his eyes off me everytime he saw me. The people I was with even told me that he likes me but I didn't believe them. I started to look at him more often and then I noticed the way he looked at me and he also smiled at me. He seemed to be a nice guy. A few months later we became coworkers and that's when he suddenly started to act cold and avoided being in the same room as me. He talked to everyone else but me. He never said hi to me first, but he did to others. Last month he talked to me for the first time, he asked me a few questions about me and then started to ask about other people. He avoided eye contact with me but he did smile a lot. He talks to me only when we are completely alone, but we can rarely be alone. When we are not alone then he avoids me. Same thing happened once again, we were alone and he asked me questions, but this time he only asked me about other people and who I talk with. I noticed he acts differently with other people, he talks to them even when there are other people around. I'm starting to believe that he actually dislikes me, and I'm not brave enough to ask him. I like him and I'm scared of getting hurt.

Why does he show signs that he likes me, but then avoids me?
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