Why was he acting weird and out of line?

Anonymous
One of my college classes I have a kind of young professor. He has to be in his 30s but is young and decent looking. I’m almost 21 so it’s natural for me to feel like he’s the cool young teacher. He knew my name from day one. He’s said it multiple times.
Yesterday I was having a discussion with some of my other classmates and my professor looked at me and engaged a little. He started taking attendance and got to my name and immediately looked down without scanning the room and was like “not here”. Lol he looked right at me when class started and he knows my name. He knew everyone else’s name in the class ( there’s only 9 of us ) and they don’t rlly stand out at all lol. I thought it was weird because he kept apologizing immediately after.
Also when I was leaving class he stopped me and was like “Ashleyyy. I’m soo sorry again” and i told him it was ok but I thought it was weird he kept apologizing.
Lol I’ve been told I’m pretty and I do have a voice in the class and speak up and everyone agrees with me always but does this mean I’m not noticeable or something g bad?
Why was he acting weird and out of line?
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