Seriously?

Discovered new things about guys...

Ladies, they don't mean to lead you on, they really don't. It's just that they were having a good time, so were you, you both seemed to get along just fine, things were cruising. You were happy to have someone to talk to, so was he.
It was a matter of let's call it, "seeming compatability" and then... he discoveres something about you that doesn't quite sit well with him or what he wants in a girlfriend/partner for life. it could be your incessant complaining, your pointing out exactly what he isn't good at, or the fact you don't make him feel as good as he'd like to feel or he'd like to think about himself and then, he pulls back. It might be so subtle you don't even realise it but believe and trust in your senses. it usually is accurate.

Men see the world in Black and White. It's action oriented, it's either gonna be that you get attached or not, no two ways about it. Either that or worst still, you're both just hanging at that awkward stage of closeness but not together, i say, buffer yourself against that happening. It might happen and if either of you is not happy with it, then that's not fine. If you're both happy, that's cool. There are rules to the game, men sometimes just want to feel good, and just can't admit it. It's no one's fault really, just play it cool and that's that but make sure you temper / measure it with your own low expectations, or you'll be the one who gets played out.