Is it normal for a boss to ignore hard work?

I know I have asked a couple questions about my boss before. Now something seems to be going on that I can’t put my finger on. A couple days before he went for,what I think was a mini vacation, he was moving very angryly around the workplace. Avoiding me as he walked by with a stern look on his face. I know he was upset about how busy we got that day, and that he had to stay longer than he hoped. But after a week, he came back with the same attitude, but its only towards me. The first day, he rushed by me only after I came into his view and said a quick “hey (my name)”. Not even looking at me. Yesterday was the same. It was so obvious that he tries to avoid me or avoid looking at me. He hides when I am around. Now he starts to leave work earlier before my shift starts. He also waits until my back is turned to the door before he storms out to the parking lot. Its like fear. I have been doing a great job at my workplace. My co-oworkers have been singing my praises to him about how well I am doing. He has never said anything to me. The other day I was doing some extra work and he left what he was doing and took over what I was doing, not even saying a word to me. Do you think its strange that he is not even acknowledging that I am doing a great job there?