How to flirt with a gym instructor/personal trainer?

Hi everyone,

I recently joined a gym and one of their personal trainers is really gorgeous, he's the youngest, so he's around my age. He teaches quite a few classes, including one to improve flexibilty.
I am very flexible but want to improve as much as I can, so I booked this class to show off a little bit haha. So far I've only had two of these classes, but I have more booked. During the last one, I made sure to place my mat in front of him, and he looked over regularly, including when I was leaning (and my breast was very exposed). We made eye contact a few times, but not in a flirty way, just in a professional kind of way. I like to think I'm quite good at detecting flirty or interested eye contacts when I see one, but if I'm trying to be as neutral and unbiased as possible, so far he's only had an average professional behaviour. I booked an induction class with him, where he was supposed to show me around the machines, etc, but that failed miserably since that very day, another personal trainer was taking over his shift.

For some reason I really really want to seduce him, I'm always really turned on when I come home from the gym after seeing him, I've challenged myself to try to seduce him and I think I've got some sort of teenage crush on him haha.
He teaches other classes but I still haven't tried anything else. I saw a few people that had other, quite intense group classes with him, leaving the gym and greeting him, calling him by his name and vice versa. And I want him to notice me, in a good way of course, not in a "hey I'm stalking you and booking all of your classes" kind of way.
Also, when I was on the treadmill, he walked past me a few times and glanced over each time, but nothing too intense so once again I'm trying not to get my hopes up.

Any tip on getting him to notice me? And how do I flirt with him without being absolutely obvious? (this is quite new to me) Most importantly I want to be subtle!

Thanks for the help and sorry for the rant!
How to flirt with a gym instructor/personal trainer?
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