You guys are tripping, she is interested, especially if she is responding to his text and calls.
A lot of beautiful women, are short with guys in text messages, that's why it's really better to call them to meet up, and don't text at all, I'm learning now you text to bull**** with plates that are average, but with the hotties you call them to meet or set-up dates, and don't text them at all, texting will make things go boring fast and will ruin you.
OP she is interested, but you have to play chess with this girl, don't follow your feelings, do everything opposite of the average guy, and you will win. The second date is the make or break, it will let you know everything, if she goes out with you second date she has high interest, once you guys are done with the second date, I wouldn't contact her until a week later bro. Third date should be at house, and you should know the rest.