This has happened to me and my co worker several times now. In his case he was talking to a girl who he delivers stuff to and she suddenly just quits replying to his texts, rather than just telling him she isn't interested or something, so then when he gos to deliver stuff there now she runs and locks her self in the bathroom while he is there.
So I went out with a girl on friday, things seemed fine, she told me a LOT of personal info, like all the clubs she is affiliated with and we had some mutual friends and she said she'd get her church info for me. So things seemed OK, she hugged me when we left. I texted her later and she replied and I replied back. I knew she worked saturday so I didn't contact her then, but today, sunday, I texted her again and she hasn't replied. I know maybe I'm jumping the gun on this, but why do women seem to prefere to just abruptly quit texting/answering the phone, rather than just say "I'm not interested in you in that way"?