Well, for this particular girl, I get that. At least, the rational side of me does. There's just a smaller irrational part of me that still thinks I can win her over. Anyway, I question your whole "seven second" thing. I've know of plenty of couples that knew each other for a while before they started dating. Heck, even this girl I'm into knew both her previous exes for several months before she dated them. If "most girls" write guys off fairly quickly, then shouldn't none of those couples have gotten together?
Anyway, I have to believe I can "win someone over in time", because people never "like" me when they first meet me, and girls are certainly never attracted to me that quickly. So if you're right, then I'm more or less doomed to never find someone, because it's not possible for me to attract someone that quickly. I'm an "acquired taste".