He probably loves the fact you're pursuing him, gets a thrill from trying to make you feel more and more awkward. It does sound very socially awkward the situation, don't you think? Nothing wrong with that. Lots of things end up awkward in life, relationships, etc.
I reckon just start ignoring him, stone wall him, maybe even roll your eyes at him when he makes stupid comments. He'll likely end up missing your attention, which he's no doubt gossiped about to others. You've probably given him a big heads-well *ahem*. So since that's not working, best thing you can do, really, is act as if you no longer give a damn...
The above of course is ignoring the fact you do have a partner, and it seems strange as hell you do care in the first place so much about another guy. But then, everyone is different with their feelings and like. If I gave a woman the same attention it sounds like you've giving him, honestly, it'd be because I'm probably wanting something more to happen.
As I've mentioned before I have had strong feelings for him, but I'm not planning on having any affairs (despite the fact that I liked him a lot better than my husband for a while - mind you, my husband can be pretty unreasonable as well so I'm not sure who I like better now overall )
I'm really not showering him with attention - he's not letting me, for one thing. I'd just like to be able to get along with him on a friendly basis, more or less the same as with everyone else in the class. I seriously don't think he's enjoying my trying to talk to him - he's described it as bothering him (I don't think he meant he felt bothered, though) and he's quite happy when I leave him alone. He actually seems scared sometimes, like when I was talking to him yesterday, but I'm guessing that's more being annoyed (since he described my behaviour as annoying a while back) and just wanting to avoid me rather than yelling at me or something. So in summary - he's happy talking to other people and so on when I don't talk to him, and he definitely doesn't want to talk about the problem. I've basically given him the silent treatment most of the time in the last few weeks, which I'm sure he's been quite content with. I'm fairly happy with my attempt at communication yesterday though. The problem is still not solved, of course, but I felt as if I'd done something.Just start giving him the silent treatment. Reverse psychology type thing. Act as if you no longer care. He's made it into all a game by the sounds of it, at your expense, so there's nothing to be gained continuing to shower him with your attention. Don't you think?