Why do friend (31M) and I (30F) have an interesting dynamic?

I’m 30F and have a 31M friend/acquaintance at my gym. I used to have a crush on him, although I genuinely don’t think I want him romantically anymore.
The confusing part is that he treats me very differently from everyone else. A friend recently pointed out that he’s nice to everyone except me. He constantly teases and provokes me, deliberately tries to get reactions out of me, and will joke about excluding me from plans with other women. He has even admitted that he knows certain things trigger me and does them intentionally.
He also seems unusually interested in my dating life. He frequently asks whether I’ve found a husband or someone cute, makes jokes about me having a boyfriend, and comments on what I want in a man. Recently, I mentioned that I’m attracted to Persian men (he’s Persian), he made a sexual joke about it, I played along, and then he immediately changed the subject.
There’s also a sexual/attraction component to our banter. He has made sexual comments toward me in the past, but as we got closer and became friends, he stopped making them.
At the same time, **he never actually pursues me.** I’ve invited him to run together multiple times; he eventually invited me on a day where I couldn’t make it, I explained why I couldn’t make it and asked for another day but he started giving me a hard time and didn’t suggest another day. He once complained that I never make plans, so I made a concrete plan to meet at a café near the gym, and he didn’t show or communicate that he couldn’t make it.
I’ve also watched him flirt heavily with other women and then back away when they reciprocated or tried to make things concrete.
So I’m struggling with the contradiction:
**If he isn’t interested, why is he so focused on my dating life and so invested in provoking me?**
But if he *is* attracted to me, why does he never actually make a move or follow through?
I’m not looking for “if he wanted to, he would.” I’m more interested in understanding the psychology of someone who seems comfortable with teasing, sexual tension, and attention but avoids actually making anything concrete.
Am I overthinking this, or does this sound like a genuinely unusual dynamic?