From a girl’s perspective I think you potentially creeped her out with all the texts and emails. That kind of persistence can be perceived as a bit desperate and red flag-y. Settle down and don’t overthink this or obsess over her. Just because she showed a bit of interest initially doesn’t mean she really WAS super keen and that you’ve just lost the potential love of your life. She may just be friendly. From my dating experience guys can read into things the complete wrong way...