Thinkingenigma,
I think with your situation last semester, things weren't really heading anywhere anyway. I think one of the main reasons is, you moved too slowly, and there may be other factors at play as to why things didn't go the way you hoped, but only you know the reason(s) for this because you know your situation better than all of us. Anyways, with that being said, I think it depends on what you told her, how you told her, and if what you said can be correlated with who you were when you told her. For example, if you said, "Well I used to be a loner" and you came across with a similar vibe, the vulnerability factor wouldn't have worked optimally. You want to make sure that when you open up to the girl, that what you're saying isn't an indication of who you are now. Like if you were in jail before, you should say it looking clean cut and as if she could never have imagined you in jail before. If you were a loner before, you want to say it only if she knows/sees you have a lot of friends and a prosperous social life.
Furthermore, from my interpretation of the concept of Byronic Hero, Chase is basically saying that a lot of guys either don't take care of themselves, or they do too much/go on the other extreme to really pump up their value and to appear flawless. He's basically telling us to follow the middle path; develop yourself into a high value guy, via fundamentals, or whatever you want to pursue. In order to reduce your value and to 'bring yourself back down to earth', he's saying that you should express some vulnerability, via words, actions. In other words, if you're a bit arrogant like me, don't be afraid to show it, despite the fact that some may consider it a 'flaw'. People are more attracted, and I'd say it works both ways, to people who are high value and desirable, but at the same time, have flaws that make them imperfect, more humanlike, and thus, more relatable.
For example, I think Kim Kardashian is sexy. She's short and not as thin as a model, but the fact that she doesn't have the perfect model type figure is what I like. If you're a soccer fan like me, look at Cristiano Ronaldo. He's Portuguese, like myself, so I understand the way he acts. A lot of people call him arrogant though, and it's traits like that that make him seem more relatable and like a human, thus a reason why I admire him so much. He's got the looks, and can get any girl he wants, but at the same time, he's got his faults, and isn't afraid to admit it.
Maybe you don't relate to the examples I've mentioned above, and that's fine. The point is, when people seem too perfect, you feel like there's something wrong. Whenever you've come across an event or person in your life, and they seemed to have everything going for them and nothing wrong, you tend to get a bit suspicious that they're hiding something/acting fake, thus liking/admiring them less. Too flawless and you won't be relatable/attractive, and too lazy and no one will want anything to do with you. Aim to master, but not to be perfect at mastery
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Cheers,
Garrett