Why does my teacher keep staring at me and giving me extra attention?

Anonymous
I've noticed him staring at me a few times when I'm not looking. Like yesterday, I was talking to a friend and he was a few feet away talking to another teacher but I could see him from the corner of my eye, staring at me continuously as the other teacher kept talking to him. He also gives me extra attention in class. He's always like "Are you understanding this? Do I need to explain it again?" He's a really nice teacher but he doesn't do this with anyone else. Like yesterday he called out my name twice in class and asked me if I was able to do the questions.

When someone doesn't do his homework he always tells them that he'll throw them out of the class but when I didn't do my homework for 3 straight classes he said, "I won't allow you to be in my class again if you don't do your home work or better yet I'll make you stay here longer." He then added playfully that he'll "torture me".

I have some extra classes with him one on one since last week and I noticed that he was dressed extra nicely yesterday and wore a lot of cologne. He never wears cologne to our regular classes.

Also, I forgot to mention that he never takes any student's names like I mean NEVER, he always calls them Ms/Mr but I'm the only one whom he addresses by their first name. The weird part is that he found out my name by himself, I never told him and he's not the one who takes our attendance.
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Today, when we had our one on one class, I was a bit down because I wasn't feeling well. He told me to do some questions and came to check up on me after a little while. He asked me if I had done the questions and I told him I couldn't because I wasn't feeling well. He got surprised and asked me why I even came to class. He then told me that, "You know I was wondering why you were a little down today but I thought maybe you just weren't in the mood to study."
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He then told me to go home and take care of myself and told me not to eat anything from outside. He also defended me against my class teacher when she got irritated as to why I'm leaving the class. He said that it's so hot and sunny these days so I might've gotten ill because of that.
Why does my teacher keep staring at me and giving me extra attention?
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