If you acting like a 'PUA' (not needy) (just trying to have fun in the moment) etc..
id guess you kind of come across as someone that is not looking for a relationship/going to be tied down anyway?

unless it was like
Girl; Im looking for someone that i can settle down with
You: Yeah i feel the same we so similar so connected blah blah, anyway when we off to yours to cement this'

few hours later your in taxi that she paid for deleting her number from your phone
thats a cunt :')