Search Results: he kept staring right at me

About a year ago I met this guy and we never really talked to each other but he always acted strange.
Like one day my mom wrote my name and she said it and then he repeated it and when I answered him cause I thought he wanted something he just looked me in the eye for the longest time, so I just went back to doing what I was doing before. My mom also was talking about something I was doing and when he heard it he smiled.( which until that moment I never saw him smile.)

Another time I was playing the piano and no one was there and he shows up out of nowhere and stands behind me the whole time and didn't say a word, until finally someone called him and he left. Super awkward.
Then one day I was sitting behind him and he had his head turned to the side and he would watch me and every time I looked up he'd turn his head forward again.
Another time everywhere I went I would turn around and he was right behind me. He also was jut flat out staring and even when I turned around and he didn't stop. So recently I was sitting in front of him and someone said something that made everyone laugh except him of course and while everyone was laughing he looked at me and squinted his eyes, and whenever someone starts talking to me he stops whatever he's doing and listens.
He was also eavesdropping on a conversation I was having with my friend and when he heard me say the place where I wanted to live he raised his eyebrows. Nice thing about him though is he defended me when this guy kept picking on me. I haven't noticed this strange behavior of his with anyone else, and I can't really figure it out because he's a stone faced image all the time. Please help!!