Why does my gym instructor single me out?

I go to an gym class where its mainly exercises for very advanced it people. I'm a total beginner, trying to get in shape. I find that I can't get through the workouts like everyone else. Its a very humbling, borderline humiliating experience when I'm the only one out of 10-15 people that's having helluva hard time. Its not only me, maybe 1 other very fit person who is also struggling. I find that after every class that ends, the instructor singles me out and says things to me like "hi, helen, nice to see you again!" or "good job"... I don't see him speaking like that to anyone else. He probably singles me out cuz I'm new and can't get through the workouts like everyone else. I don't know I just feel like he's just targeting me cuz I can't do the workouts and it makes me kinda uncomfortable.

Why does my gym instructor single me out?
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