I wouldn't worry too much about the texts and how you came across in them. A lot of texts come off that way, esp. ones men write because you guys are so much more factual than us!
Having said that, I don't think it's wrong for you to be "brief" and making her wonder if something is up. The whole idea right now is to get her guessing about your mindset...
Now: as for the loving part of all this and showing her your non-gruff side... that's a play by play kind of thing. I do know how you feel! Not sure whether you're supposed to be acting kinder in showing a 180 or whether you're supposed to be tougher in detaching and letting go. It doesn't have to be an either/or situation!