Guy's Behavior

Why a guy from work would give mixed signals?

This guy at work who is my boss is acting hot and cold since I met him. He is smiling , he stares at me. He is talking with me. Sometimes he does the opposite and he doesn't say a thing. A week ago he heard a conversation I had with a coworker. He heard me saying I was going outside to have a walk. 2 seconds later he was in front of me. We started talking and we were mid path to a park. Suddenly he said he needs to go somewhere else and he just left. Awkward moment. I mean my thoughts are that he doesn't want to be seen with his subalterns. I get it because while we were walking I was feeling weird and it just didn t feel right. Maybe the vibe was tense because we feel something for eachother. I have no idea really... any thoughts about this?
Why a guy from work would give mixed signals?
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